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Jennie's dog, who is good at solving mysteries, helps her friend Susan find her lost house key.

Explains through simple experiments the principle of dimensions and how they are measured.

Two sets of twins suspect their neighbors of wrong-doing when they observe the strange behavior of the couple's nephew.

Fifth grade sleuth Cam Jansen and her friend Eric combine wits to solve the mystery of the disappearance of a young French girl.

When a famous sculpture is stolen from the museum, two sets of twins team up to track down the thief.

Text and illustrations depicting scenes of a haunted house introduce algebraic terms and concepts.

Cam Jansen and her friend decide to investigate when a strange cat appears in their classroom one rainy day.

Cam Jansen uses her photographic memory at the school Green Fair to solve a mystery involving a missing electric car.

Cam and her friend Danny help solve the mystery of a stolen pearl necklace when the governor comes to visit their school for the dedication of the new library.

Supersleuth Cam Jansen solves three mysteries during her class's Sports and Good Nutrition Day.

Cam Jansen trys to solve another mystery when she discovers a trash can in front of a house that is supposed to be empty while selling candy with Eric for the school fundraiser.

Cam Jansen relies upon her photographic memory to help her solve the mystery of who is taking bones from the dinosaur exhibit at the museum.

Cam and her friend Eric chase the thief of Aunt Katie's wallet through an amusement park.

Explains in simple terms the concept of supply and demand with examples of how prices are derived and the conditions that contribute to setting them up.

Using her photographic memory Cam Jansen joins Eric in solving the mystery of a Valentine's day robbery in a hospital waiting room.