The Empty Envelope (A to Z Mysteries)

<p><b>Help Dink, Josh, and Ruth Rose solve mysteries from A to Z! </b><br> <b> </b><br> Kids love collecting the entire alphabet and super editions! With over 8 million copies in print, the A to Z Mysteries® have been hooking chapter book readers on mysteries and reading for years. Now this classic kid favorite is back with a bright new look!<br> <b> </b><br> E is for Envelope . . . Who is sending letters to Dink? All week long, Dink has been getting strange mail. The envelopes are addressed to &quot;D. Duncan,&quot; 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?</p>