A TO Z MYSTERIES - THE SERIES Dink loves to read, Josh loves to explore and Ruth Rose always wants to know what happened, why it happened, who it happened to, and when and where it took place! In the meantime, these best of friends with their sense of adventure and curiosity always seem to find themselves involved in solving a mystery! This series of fast-paced, collectible mysteries are great fun for confident readers. THE EMPTY ENVELOPE E is for Envelope…Dink keeps getting envelopes in the mail addressed to “D. Duncan.” But the letters inside all start with “Dear Doris” and don’t make any sense! Josh and Ruth Rose think someone’s playing a trick on Dink. But Dink is sure there’s more to it than that, especially after Doris herself shows up and demands her letters!