![The Clue of the Left-Handed Envelope (Third-Grade Detectives, No. 1) [Paperback] George E. Stanley and Salvatore Murdocca](https://i0.wp.com/susansbooksandgifts.com/wp-content/uploads/2026/05/71v4MpmL3gL.jpg?fit=671%2C1000&ssl=1)
The Clue of the Left-Handed Envelope (Third-Grade Detectives, No. 1) [Paperback] George E. Stanley and Salvatore Murdocca
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Mr. Merlin’s Third Graders are known as the Third Grade Detectives — with some hints from secret code clues and help from Mr. Merlin’s friend, the police scientist Dr. Smiley, they help solve cases.
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