A to Z Mysteries: The Empty Envelope (A Stepping Stone Book(TM))

Description

E is for Envelope . . . Who is sending letters to Dink? All week long, Dink has been getting strange mail. The envelopes are addressed to “D. Duncan,” but the letters inside are for someone named Doris. Plus, one envelope is empty! Could it be a secret code? And can Dink, Josh, and Ruth Rose crack it?