The Aldens are spending their first week of summer at Camp Quest in Colorado. The children are excited to learn about fossil-hunting and paleontology from renowned scientist Dr. Iris Perez. But strange events at the camp make them wonder if the legends of a bigfoot-like creature roaming the valley might be more fact than fiction. Can the Aldens help Dr. Iris figure out who - or what - is causing such a stir?

When an oil spill takes place off the coast of Connecticut, the Aldens are happy to volunteer to help clean up the animals affected, including a rare species of shore bird. But could more have been done to prevent the spill? As the Aldens take up the case, it leads them on an adventure to help other endangered animals around the world.

Henry, Jessie, Violet, and Benny didn't think the old trunk in their house held anything interesting. But an unusual statue they find inside leads them to the Reddimus Society, a secret guild dedicated to returning lost treasures to where they belong. Now the Aldens must help their new friends by traveling across the country with the statue and six mysterious boxes! Can the Boxcar Children keep these seven treasures out of the wrong hands?

Before they were the Boxcar Children, Henry, Jessie, Violet, and Benny Alden lived with their parents on Fair Meadow Farm. Although times are hard, the Aldens are happy - “the best family of all,” Mama likes to say. One day, a blizzard hits the countryside, and a traveling family needs shelter. The Aldens take them in, and the strangers soon become friends. But things never stay the same at the farm, and the spring and summer bring events that will forever change their lives.

When four orphaned siblings must flee their town in the middle of the night to avoid being split up, a boxcar in the woods becomes their new home. Thanks to their practical skills, a helpful stray dog, and the kindness of strangers, the brothers and sisters are able to build a new life together. Acclaimed voice actor Jim Weiss reads Gertrude Chandler Warner's 1924 novel with warmth and humor.

Three complete stories in one collection! Includes The Gymnastics Mystery, The Poison Frog Mystery, and The Mystery of the Empty Safe.

Three complete stories in one collection! Includes The Black Pearl Mystery, The Cereal Box Mystery, and The Panther Mystery.

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! This volume includes The Mystery Horse, The Mystery at the Dog Show, and The Castle Mystery.

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