Note from the Author

Greywalker launched the series about  paranormal P.I. Haper Blaine in 2006 to extraordinary sales for a first novel. The series hit National Bestseller status in 2008, to my unexpected joy. The books were translated into German, French, Polish, Russian, and Chinese, and marketed all over the world in print, audio, and ebook format.

I enjoyed Harper’s adventures in the Grey very much, but by 2013, I was running out of really cool ideas, and sales were slumping. I figured it was time to let the series go—and give poor Harper a chance to live a normal life beyond the page—rather than create disappointing books. So in 2014 Revenant, the ninth book, was the last, although I did get a few short stories about Harper and her friends out into the world in varous anthologies and online venues before and after. I’m incredibly flattered by the enthusiasm of fans for the stories and characters, and while I don’t have plans to produce more Greywalker Novels right now, the future is always full of possibility.



The Series in order:


Greywalker Novel #1


Harper Blaine’s introduction to the Grey places her in the path of monsters and ghosts. She’ll have to learn fast if she’s to solve her case and stay alive.

Recovering from a near-fatal accident, Seattle Private Investigator Harper Blaine develops the ability to move through the Grey: the realm of ghosts, vampires, witches, and magic that exists between our world and the next. Harper wants her life to return to normal, but when her clients turn out to be paranormal, the reluctant Greywalker is drawn into the affairs of ambitious vampires and angry ghosts. As her cases converge, Harper uncovers a plot that threatens Seattle’s Grey world and must choose between honor and survival.

Well-produced, pleasingly peopled, with a strong narrative and plenty of provocative plot lines: a superb beginning to the series that’s unquestionably in the offing.–Kirkus (starred review).

This spooky, occasionally terrifying, and sometimes funny book plays like a mash-up of Jim Butcher’s Dresden Files and the Kinsey Millhone mysteries by Sue Grafton. …Offers the welcome prospect of a whole series of sequels. — Robin D. Fish Jr. A Fort Made of Books.

Greywalker is a non-stop action book with an intriguing premise, a great heroine, and enough paranormal complications to keep you on the edge of your seat. Richardson’s characters are multi-dimensional and engaging, and I enjoyed this book all the way through.–Charlaine Harris

Fast-paced fun, this first novel will captivate fans of Charmed, Buffy, and Charlaine Harris.–Publishers Weekly (starred review).

Richardson’s first novel features a genuinely likable and independent heroine with a unique view of reality. Following in the tradition of Tanya Huff and Jim Butcher, this is a strong addition to the growing body of urban fantasy mysteries.–Library Journal

This book kicks ass! A perfect blend of hard-boiled P.I. and supernatural thriller. It’ll grab you from the first page and won’t let you go until the last.–Jennifer Jordan, Crimespree Magazine.


Greywalker Novel #2


A college psychology experiment may have created a very real ghost. When the mind games lead to murder most gruesome that’s just the beginning….

Halloween is approaching when Harper agrees to investigate the members of a research group who’ve been attempting to create an artificial poltergeist. The head researcher suspects someone’s been faking the phenomena, but Harper’s investigation reveals something entirely different–they’ve succeeded. When one of the group’s members is killed in a brutal and inexplicable fashion, Harper must determine if the murderer is the ghost itself or someone all too human.

In the days leading up to Halloween, Harper’s been hired by a university research group that is attempting to create an artificial poltergeist. The head researcher suspects someone is faking the phenomena, but Harper’s investigation reveals something else entirely – they’ve succeeded.

And when one of the group’s members is killed in a brutal and inexplicable fashion, Harper must determine whether the killer is the ghost itself, or someone all too human.

Clever ghost-busting follow-up to her solid urban fantasy debut… Richardson’s view of the paranormal has a nice technological twist and features intriguing historical notes that lift this whodunit a cut above the average supernatural thriller.–Publishers Weekly

Whatever you choose to call it, let’s hope Harper Blaine returns for many more equally exciting exploits.–Don D’Ammassa, Critical Mass

An intriguing mystery and a resourceful sleuth who grows stronger in her knowledge of her transformed self.– Library Journal

Harper’s charmingly stubborn, the liminal world of the grey is fascinating, and some of the peripheral characters are intriguing in their own right, adding up to make this one of the most interesting in the latest crop of supernatural mystery series.–Locus

A sharp, sinister urban fantasy that blends storytelling and real Seattle history. Thoughtful, painstakingly researched, and engaging, this series is perfect for fantasy/horror fans looking for something more than a spine-tingling cheap thrill.–Wordcandy


Greywalker Novel #3


The dead are piling up in Seattle during the coldest winter on record, but some of them won’t stay down and it’s not the cold that’s killing them…

Pioneer Square’s homeless are turning up dead and mutilated, and zombies have been seen roaming the underground–the city buried beneath modern Seattle. When Harper’s friend Quinton believes he may be implicated in the deaths, he persuades her to investigate. But the killer is no mere murderer–it is a creature of ancient legend. And Harper must deal with both the living and the dead to stop the monster and its master…unless they stop her first.

A fast paced, edge of your seat fantasy adventure with many surprises and some new wrinkles in this fast growing sub-genre. If you get a kick out of things that go bump into the night, this book is just your ticket. Get it punched now.–Ron Fortier Pulp Fiction Reviews

The best single novel in this category I’ve read so far this year.–Don D’Ammassa, Critical Mass

“Part Indian folklore, part detailed urban history, part PI procedural, part monster-from-the-depths horror story.”-Booklist



Greywalker Novel #4


A phone call from a dead boyfriend sets Harper Blaine on a dangerous and ghost-strewn path into her own past….

For Harper, her own case may prove the most difficult to solve. Why did she as opposed to others with near death experiences become a Greywalker? When Harper begins digging into her own past, she unearths some unpleasant truths about her father’s early death as well as a mysterious puzzle. She sets out to find his ghost but encounters only a void where he should be, leaving her with more unanswered questions.

Before she can continue her search, Harper gets an offer she can’t refuse to go to London and pursue an investigation on behalf of some very demanding vampires. But there are unpleasant surprises waiting for her, and Harper soon discovers her present trouble in England is entangled with her dark past back in Seattle and her ultimate destiny as a Greywalker.

…Fierce… a spirited smack-down with old foes. Richardson continues to develop strong, intriguing plots, and fans will enjoy learning about Harper’s childhood and seeing some of her literal ghosts put to rest.–Publishers Weekly

Better and better with each book and I simply cannot stop reading till it’s done.–Jon Jordan, Crimespree Magazine

Richardson’s descriptions of London with its ghostly layers of “grey” builds a tremendous platform for the eerie action. Harper is in a world of trouble! (Four stars)–RT Book Reviews


Greywalker Novel #5


Harper has discovered some of the dark secrets of her own past; now she’ll have to use her burgeoning and terrifying powers to change her future. Or die trying.

Just back from London, Harper picked up some new skills while she was away. But instead of taking the time to hone them, she’d rather focus on what’s important. Like finding the two-bit perp who “killed” her. She’s convinced he’s a valuable clue in the puzzle of her past and her missing father, as well as a key to figuring out who’s trying to manipulate her powers and why.

There’s just one problem. Turns out the man who “killed” her was murdered himself while she was away. Lucky for Harper, she has an airtight alibi, but that doesn’t mean the police are going to play nice. With Seattle’s recent surge in violence—thanks to the vampires—she’s already under suspicion. Which means Harper has to watch her step. Because finding the ghost of her “killer”—and rescuing her father—will mean entering into the Grey. And with her growing powers pulling her more deeply into that paranormal world, Harper’s afraid she may not be able to come back out…

“Richardson’s once-playful Harper is clearly becoming a supernatural force to be reckoned with.”—Publishsers Weekly

“Standing head and shoulders above the plethora of urban fantasies, Richardson’s latest tale should appeal to fans of Jim Butcher’s “Dresden Files” and Tanya Huff’s Victoria Nelson series.”—Library Journal

“Richardson pulls out all the stops making this novel a fast-paced and terrifying ride. Richardson’s ability to spin a complex and riveting story is undeniable and the proof is on the page. Kudos!”(4.5 stars)—Romantic Times Book Reviews

“(T)he Greywalker saga is the very best paranormal fantasy out there.”—Paul Goat Allen, Barnes and Noble Book Club

“Harper is one hell of a protagonist.”—Crimespree Magazine


Greywalker Novel #6


Death can’t keep Harper down for long. She’s hot on the trail of a forgotten murder in a scenic resort where magic is thicker than the blood of its victims.

After being shot in the back and dying—again—Harper’s recovery has been hard. She’s lost a great many of the powers she’d acquired since first becoming a Greywalker, and Harper knows that if she dies again, she won’t be coming back.

Her only respite from the chaos is her work. But while conducting a pre-trial investigation in the Olympic Peninsula, she envisions a fatal car accident for which there are no records. Worse still, the victim of the wreck insists he was actually murdered, and that the nearby town of Sunset Lake—called “Blood Lake” by locals—is to blame.

The picturesque town is as unlikely a haven for conspiracy and malignant magic as Harper’s ever seen. But she soon learns that the icy waters of the lake hide a terrible power, and a host of hellish beings. And both are held under the thrall of a sinister cabal that will use the darkest of arts to achieve their fiendish ends…

“Reading a Greywalker novel is the pinnacle of literary escapism for me. It’s full immersion from the very first words. Downpour begins in typical Richardson style – a brilliant hook and a subtle reference to Chandler all in the first few sentences.”–Paul Goat Allen, Barnes and Noble Explorations SF/F Blog

“Original and unique. …Puts a new spin on the entire private investigator angle, and is utterly fascinating.”–The Ranting Dragon

“Hard to put down.”–Falcata Times

“One of the best examples of true urban fantasy.”–Night Owl Paranormal



Greywalker Novel #7


More than a quarter century ago, the Seawitch cruised away from her dock and disappeared with everyone on board. Now, the boat has mysteriously returned to her old berth in Seattle and the insurance company has hired Harper to find out what happened. But Harper is not the only one investigating. Seattle Police Detective Rey Solis is a good cop, albeit one who isn’t comfortable with the creepy cases that always seem to end up in Harper’s lap.

As they explore the abandoned vessel, Harper and Solis discover a cabin containing symbols drawn in human blood, a haunted engine room containing an artifact that should never have been aboard, and a log book that hints at dark events leading up to the ship’s original disappearance. But the search for answers leads to a mysterious suicide, monstrous creatures, and the horrifying wreck of another ship a hundred years earlier. To discover the answer to the disappearance of the Seawitch’s passengers and crew, Harper and Solis will need to put aside their differences and solve a deadly mystery more than a hundred years in the making…


Kat Richardson takes lovers of the paranormal by storm in this wickedly suspenseful tale. Even readers without a passion for the supernatural will appreciate this page-turner mystery. — Fresh Fiction Review

A great adventure. — The Steel Bookshelf

Full of eerie menace, Seawitch is an outstanding addition to Richardson’s excellent series. — Romantic Times Book Reviews

Richardson’s Greywalker saga is the Crème de la Crème of Supernatural Fiction — Paul Goat Allen, Barnes & Noble Explorations

Richardson continues to produce fast-paced, intriguing urban fantasies featuring a tough and independent heroine. Series fans will want this title; recommend this also to readers who enjoy C.E. Murphy’s Walker series and the novels of Rachel Caine, and Seanan McGuire. — Library Journal



Greywalker Novel #8


A coma patient has roused with strange new skills… Or is she possessed…? Harper will have to discover the truth as more patients awaken.

When a comatose woman suddenly wakes up and starts painting scenes she’s never witnessed with a skill she’s never had, medical science has no explanation. As more bizarre phenomena manifest, including mysterious writing appearing on the patient’s skin and strange voices issuing from her mouth, even her doctors start to wonder if the woman may be possessed.

Frustrated, frightened, and at the end of her rope, the patient’s sister reluctantly turns to Harper Blaine to discover who—or what—is occupying her sister’s body. As Harper digs into the case of apparent possession, she discovers other patients struck with the same mystifying afflictions and a disturbing connection to one of the most gruesome episodes in Washington’s history…

Distinctively well–fleshed-out characters and an absorbing, logically constructed plot lift this one, and the series, above the supernatural average. — Kirkus Reviews

“Possession” has it all: crisp writing, engaging storylines, and a champion and cast of characters you can root for. Always recommended.—Shannon Raab, Suspense Magazine

Kept me flipping the pages at a maddening pace…. Fans of mystery and urban fantasy with flesh(ed)-out, kick-ass characters will enjoy Possession and the Greywalker series. This author/series is an auto-buy for me and once again I find myself drooling for the next installment.—Caffeinated Book Reviewer

This urban fantasy series is always one I look forward to reading. The worldbuilding is richly creative. And the mysteries are fun and thrilling. This latest installment was impossible to put down with a memorable plot. — SciFi Chick

In book after book, Richardson proves she does eerie and creepy really, unbelievably well and Possession just cements that fact. — Romantic Times Book Review (4 stars)


Greywalker Novel #9


Quinton’s neice has been kidnapped. Harper is determined to help get her back, but that will mean taking on an ancient bone cult and Quinton’s father.

Turmoil, sickness, and destruction are sweeping through Europe–and the effects are being felt all the way across the world. Harper Blaine and her lover, Quinton, suspect that Quinton’s father, James Purlis–and his terrifying Ghost Division–are involved. When Quinton’s six year old niece is kidnapped in Portugal, a trail of dark and gruesome crimes leads to an ancient and forgotten cult that has allied with Quinton’s mad father. But their goals are far more nightmarish than Harper and Quinton–or even Purlis–could ever imagine.

But Harper has an unlikely ally in the form of Carlos–vampire and necromancer–whose own bloody past is tied to the cult and events in Lisbon, where the desecrated tomb of a sleeping king and a temple built of bones recall Harper’s very first paranormal case and hold clues to the cult’s true intentions. Harper and Quinton will need all the help they can get to avert a necromantic cataclysm that could lay waste to Europe and drag the rest of the world to the brink of war.

“Richardson brings her riveting Greywalker series to a stunning and satisfying close… incredible reading!” (Top Pic for August 2014, 4 1/2 stars) — RT Book Reviews

“If you enjoy the mix of mystery and fantasy you can’t miss this series!” – King’s River Life

“With plenty of suspense, intrigue, adventure and drama – there is plenty of surprise along the way. This was an impressive and satisfying conclusion to a terrific series” — SciFi

“There’s twists and turns and surprising revelations aplenty to keep the fans of the series reading into the wee hours of the night.” – SFRevu

“You will love this book.” –  The Reading Cafe