Dink Duncan gets strange letters addressed to D. Duncan. Inside, the letters say: Dear Doris. His friends Josh and Ruth Rose find a secret code in the letters: Jenny hidden on fifth envelope. The trio discovered that "Jenny" is a $50,000 stamp, stolen from a New York resident. Doris Duncan is coming to retrieve her envelopes in 12 minutes. Ruth Rose comes up with a plan, but will it work? Read The Empty Envelope to find out!
Dink, Josh,and Ruth Rose keep getting letters from a person they did not now. they got 5 letters, the last letter was different .they found a crook on the they the way to the mysteries. if you like mysteries you will like this book.