Mr.
And in their next case, a dirty handkerchief.
In their first case, The Clue of the Left-Handed Envelope, the Detectives find out who has been sending Amber Lee anonymous letters.
This two-in-one flip book contains the full text and illustrations for the first two Third Grade Detectives books.
Smiley, they help solve cases.
Merlin\'s friend, the police scientist Dr.
Merlin\'s Third Graders are known as the Third Grade Detectives -- with some hints from secret code clues and help from Mr.
Mr