The Bookwoman's Last Fling (Cliff Janeway)

Janeway receives an invitation from wealthy horse trainer H.R. Geiger to come to Idaho to appraise his book collection, but by the time Janeway arrives, his host is dead. He winds up tracking down some rare volumes that have vanished and probing the decades-old death of Geiger's wife, a wealthy heiress who collected valuable juvenile fiction. When a fresh body turns up and Janeway himself almost falls victim to a killer, the bibliophile detective finds that his decision to pursue the truth puts him at odds with his longstanding significant other.