"Do you have a library-card holder by the name of Stella Nickell?" Stone asked the librarian. The woman searched the library's files and returned with a piece of paper which she handed to Stone. It was an overdue notice for a book Stella had borrowed and never returned. Its title: Human Poisoning.
Armed with Stella's card number, Stone combed the aisles for all the other books Stella had borrowed. When he opened a volume on toxic plants called Deadly Harvest, he found her number stamped twice on the checkout slip-- both dates before Bruce's death.
He packed the book and the volumes that covered cyanide from three encyclopedias and sent them to the FBI crime lab. Fingerprint analysis revealed 84 of Stella's prints in Deadly Harvest--the biggest concentration on the pages discussing cyanide.
