
Part of the Third-Grade Detectives series
A mysterious intruder leaves a yucky clue in Todd's tree house.
Todd's treehouse holds a secret. With his ears clogged, he struggles to hear, but a mystery awaits in his own backyard. An intruder leaves a peculiar clue, and Todd, with the help of his ex-spy teacher Mr. Merlin and police scientist Dr. Smiley, must unravel the truth. Who's been sneaking around, and what do they want? As Todd pieces together the puzzle, he must navigate secret codes and unexpected twists. Will he uncover the identity of the mysterious visitor before it's too late?
WHO’S BEEN HANGING OUT IN TODD’S TREE HOUSE? Todd’s ears are so clogged up he can’t hear, but he doesn’t want to miss school. His teacher, the ex-spy Mr. Merlin, is sure to have secret codes for the class to figure out and a new mystery for them to solve. But the mystery turns out to be in Todd’s own backyard. Someone’s been in his tree house and left a pretty yucky clue. It’s another case for Mr. Merlin’s police scientist friend, Dr. Smiley!
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