Murder at the college library

An invitation from a prestigious liberal arts college to buy their mystery-novel collection comes as a welcome surprise for Raymond Ambler, crime-fiction curator at New York City's prestigious 42nd Street Library. But his pleasure quickly turns sour when the collection's curator - Ambler's friend Sam Abernathy - tells him he plans to fight the acquisition tooth and nail. The collection would make a fine addition to his holdings, but Ambler's not looking for drama. It's a shame, then, that drama's looking for him. Just a couple of weeks later, one of Abernathy's colleagues is shot dead from the library's roof, and all signs point to the crime-loving professor as the perpetrator of the violent act. Why would Abernathy kill - and was it for his collection, for college politics, or for some dark secret yet to be revealed?