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Noelle and Todd hope to impress their new third grade teacher by being the first to use his clues to figure out who sent an anonymous note to another classmate.

Noelle and her friend Todd decide to investigate when her dog Rover is unjustly accused of tearing up Mrs.

When he finds a clue to a mystery in his tree house, Todd enlists the help of his third-grade classmates to identify the trespasser who had left it there.

"Someone knocked out Todd and Noelle's friend Pops Verner, the night watchman at the department store, and stole his treasured pocket watch.

The Third-Grade Detectives investigate when a fifteenth-century statue is stolen from an art museum and destroyed.

Contains two stories in which third-grade sleuths Noelle and Todd set out to impress their new teacher by finding the author of an anonymous note and search for a trespasser who left a mysterious pink handkerchief in Todd's tree house.

The detectives are on the case. What does the clue on the left-handed envelope mean? Who is sending them a message?.

Todd must conquer his fear of spiders and cobwebs in order to help his third-grade class catch a thief.

When her dog Rover is accused of tearing up Mrs. Ruston's tomato plants, Noelle investigates with her friend Todd and finds long yellow hairs that may point to the real culprit.