Box Car Mysteries

Three complete stories in one collection! This volume includes The Growling Bear Mystery, The Mystery of the Lake Monster, and The Mystery of Peacock Hall.

Three complete stories in one collection! This volume includes The Mystery of the Secret Message, The Firehouse Mystery, and The Mystery in San Francisco.

Three complete stories in one collection! Includes The Chocolate Sundae Mystery, The Mystery of the Hot Air Balloon, and The Mystery Bookstore.

Three complete stories in one collection! This volume includes The Mystery of the Lost Mine, The Guide Dog Mystery, and The Hurricane Mystery.

Three complete stories in one collection! Includes The Mystery at the Crooked House, The Hockey Mystery, and The Mystery of the Midnight Dog.

This bundle includes The Mystery of the Pirate's Map, The Ghost Town Mystery, and The Mystery in the Mall.

Henry, Jessie, Violet, and Benny are off to the rain forests of Sumatra, where a protected piece of land is home to endangered animals such as orangutans, elephants, and tigers. But when part of the forest gets cut down, the Aldens have to figure out who is responsible, not only to protect the rain forest, but also the animals within.

Three complete stories in one collection! Includes The Mystery of the Mummy's Curse, The Mystery of the Star Ruby, and The Stuffed Bear Mystery.

Three complete stories in one collection! Includes The Radio Mystery, The Mystery of the Runaway Ghost, and The Finders Keepers Mystery.

Three complete stories in one collection! Includes The Mystery of the Haunted Boxcar, The Clue in the Corn Maze, and The Ghost of the Chattering Bones.

Three complete stories in one collection! Includes The Ice Cream Mystery, The Midnight Mystery, and The Mystery in the Fortune Cookie.

The Aldens’ favorite hockey star, Kevin Reynolds, is coaching a girls’ hockey team and build a new skating rink right in Greenfield. But when team practices begin, equipment is missing and Kevin’s plans for the new rink are almost ruined. Is someone trying to stop Kevin?

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 are orphans. Can they find a home where they can stay together as a family?

Three complete stories in one collection! Includes The Great Bicycle Race Mystery, The Mystery of the Wild Ponies, and The Mystery in the Computer Game.

After helping clean up an oil spill in Connecticut, the Aldens are heading to a much cooler climate, where scientists are working to conserve the snow leopard population. With only hundreds left in the world, the Aldens know each animal is important. Can the Aldens do their part to help save this elusive and important animal?

This collection includes The Mystery of the Stolen Snowboard, Mystery of the Wild West Bandit, and The Mystery of the Soccer Snitch.

Three mysteries in one collection! This volume includes: The Rock 'n' Roll Mystery, The Secret of the Mask, and The Seattle Puzzle.

Three complete stories in one collection! Includes The Disappearing Staircase Mystery, The Mystery on Blizzard Mountain, and The Mystery of the Spider's Clue.

The Aldens have joined Dr. Iris Perez as she investigates legendary creatures around the world. In this adventure, the children travel to Iceland to look into stories of mischievous elves causing trouble. The legends of huldufolk, or hidden people, go back a long way in the country, but are elves really the cause of the problems, or is there a more natural explanation for the strange events on the island?​

Three complete stories in one collection! Includes The Vanishing Passenger, The Giant Yo-Yo Mystery, and The Creature in Ogopogo Lake!