Gertrude Chandler Warner

While investigating the disappearance of Spotzie, Mr. Woods's beloved cat, the Alden children discover that they are being followed by a strange man, receive threatening phone calls, and uncover a number of mysterious suspects in the catnapping. Simultaneous.

"The Aldens are spending spring break on a beach, but they aren't just soaking up the sun. They're protecting an endangered species! Their job is to mark sea turtle nests so the eggs can be moved to a safe place to hatch, but someone is digging up the eggs without permission. Can the Boxcar Children figure out what's going on and help save the sea turtles?"--Amazon.com

At the same time that the Alden children's efforts to raise money for a new hospital wing are being sabotaged by nasty tricks, they find their attempts to befriend the new girl Beth frustrated by her strange behavior.

Benny wants adventure and finds it as he and the other Alden children help uncover the plan of those who would prevent ballooning from coming to Lloyd's Landing.

The Aldens are excited to learn about beekeeping. But when equipment goes missing, they have more than honey to harvest -- they have a mystery to solve!

The Alden children help out a storeowner at the Hope Harbor Mall and discover that someone is tampering with the merchandise shipments.

First published in 1924, "The Box-Car Children" is the beloved children's classic by American grade school teacher and author, Gertrude Chandler Warner. It is the story of four orphaned siblings, Henry, Jessie, Violet, and Benny, and their adventures living in an abandoned boxcar in the forest. The children are having fun while living in the boxcar at first, though several adults in the community are aware of their situation and are keeping an eye...

When their favorite author fails to arrive as scheduled to speak at the local library, the Alden children investigate how he could board a train and never be seen again.

The Aldens visit Grandfather's friend, Abby, at the Ogopogo Retreat, and attempt to help the woman get more business for her resort, even though something is trying to stop them.

"When the Alden siblings visit their grandfather's friend in an apartment building, they begin to wonder about the many mysterious events that keep happening on the thirteenth floor of that building."--