After Eric moves away he sends cryptic notes to Sebastian and David, who attempt to make sense of them by investigating a mysterious death.

A fifth-grader uses her photographic memory, her mother, and her friend Eric to find a missing reel of a monster film they go to see.

Arrthur's friend Buster is searching for a crime to solve, so when the quarters Arthur has collected for Mrs. MacGrady's charity drive disappear, Buster is on the case. Will he be able to prove Arthur's innocence so that he can attend the class picnic?

Encyclopedia Brown, boy detective, solves ten more mysteries. The solutions are given at the end of the book.

Herculeah Jones and her best friend Meat set out to crack the case of the mysterious note which she finds in the lining of a second-hand coat.

While on a bicycle trip to their aunt's farm, the four Aldens help solve a mystery. One warm night four children stood in front of a bakery. No one knew them. No one knew where they had come from. Henry, Jessie, Violet, and Benny used to live alone in a boxcar. Now they have a home with their grandfather and are going on a bicycle trip. On the first night of their journey, the Boxcar Children get caught in a rainstorm. They find shelter in an...

The mysterious disappearance of a reclusive neighbor's cat involves the Boxcar children in some complicated detective work.

Rob admits having seen a murder, but no one believes him--except the murderer.