Cliff Janeway series by John Dunning

Booked to Die
Denver homicide detective Cliff Janeway may not always play by the book, but he is an avid collector of rare and first editions. After a local bookscout is killed on his turf, Janeway would like nothing better than to rearrange the suspect's spine. But the suspect, local lowlife Jackie Newton, is a master at eluding the law, and Janeway's wrathful brand of off-duty justice costs him his badge.
Turning to his lifelong passion, Janeway opens a small bookshop -- all the while searching for evidence to put Newton away. But when prized volumes in a highly sought-after collection begin to appear, so do dead bodies. Now, Janeway's life is about to start a precarious new chapter as he attempts to find out who's dealing death along with vintage Chandlers and Twains.
Includes information on John Dunning's new Cliff Janeway novel, The Bookman's Promise, coming soon in hardcover from Scribner

The Bookman's Wake
Cliff Janeway, a book dealer, agrees to collect a woman who has skipped bail in Seattle. But when he arrives, he realizes he's been employed to find a rare edition of "The Raven". He also learns that those who are known to have owned copies of the book have met untimely deaths.

The Bookman's Promise
When Cliff Janeway investigates the provenance of a signed first edition of a memoir by nineteenth-century explorer Sir Richard Burton, he becomes embroiled in a mystery involving a lost library of rare Burton material.

The Sign of the Book
Packed with "juicy nuggets of bibliophile gold" ("Booklist"), this irresistibly suspenseful bestseller traces the mark of murder inside the world of rare books.Assessing a book's value is Denver cop-turned-bookseller Cliff Janeway's expertise. But even a pro like Janeway could be supremely challenged by certain signed first editions. When is an autograph authentic? How can forgeries appear to be so convincingly real? The same questions apply, it seems, to a murder investigation in tiny Paradise, Colorado. Janeway agrees to help his lover, attorney Erin D'Angelo, determine if Erin's estranged childhood friend killed her husband -- or was her confession designed to protect her troubled young son? Then Janeway discovers the dead man's books: an impressive collection that may house some real gems. But it's not their financial worth that draws Janeway deeper into the case of deadly small-town secrets -- it's the hunger for peeling back layers of deception to reveal the genuine sign of the book. And in a case of cold-blooded murder, truth is a priceless commodity.

The Bookwoman's Last Fling
As a young man, "New York Times" bestselling author John Dunning earned his living for several years working behind the scenes on the racetrack circuit. Now he brings his memories of the horse world and his expertise in collectible books to this mesmerizing new Bookman novel rich with the lore of both books and horses. . . . Denver bookman Cliff Janeway would have liked Candice Geiger. She loved books with a true bookwoman's passion. Her collection of first-edition children's books is the best that Janeway ever hopes to see. Sadly, Janeway and Candice Geiger will never meet. She died much too young. Now, twenty years later, her books remain a testament to an extraordinary woman's remarkable vision.