Gertrude Chandler Warner

Four orphaned children used to live alone in a boxcar. Now they have a home with their grandfather, and in their new life encounter various adventures and mysteries.

Four orphaned children make a home for themselves in an abandoned boxcar and are united with their grandfather.

Six children help solve the mystery of a missing spyglass that has kept two brothers feuding for years.

"When the Alden children see odd lights coming from a closed amusement park and they receive a phone call warning them to stay away, they are determined to figure out what is going on at the park"--

The Alden siblings try to investigate who is sabotaging the summer soccer team, stole the basketball MVP trophy, and is spying on the signals of the Cogs' pitcher.

Henry, Jessie, Violet, and Benny are excited to learn more about raptors when they volunteer at a rehab center for wild birds, but not long after they arrive, a series of strange events makes it seem like someone might be trying to sabotage the center.

When the Aldens have the chance to work at a candy factory, they try to find out who is sabotaging the candy and why.

While visiting an old mansion, the Aldens investigate the possibility that it may be haunted.