Booked to Die by John Dunning

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