Amazon.com description: Product Description: "The Thumbprint Mysteries" series have been carefully written for young adults and adults at a particular reading level. Each book presents a suspense crime in which the reader must solve one or more mystery murders. Readers follow the clues and draw conclusions about the suspects and events, helped by the characters who are trying to solve the crimes. The mystery genre guarantees enjoyable reading. Teaching notes accompany the three different levels. These include, for each title, a pre-reading activity and synopsis of the plot, followed by vocabulary and skills work. An answer key is provided.