When their grandfather arranges for them to spend two week at Sunny Oaks, the four Alden children enjoy settling into the routines of farm life but become suspicious about a mysterious horse locked in the stables.

Jessie and Henry's robotics team is competing in a big tournament. But when their robot is stolen, the Aldens have a high-tech mystery to decode!

The Alden children investigate various mix-ups at a zoo run by their grandfather's friend in an effort to save it not only from pranksters but also from the town council.

Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they investigate the mystery of a curious train caboose in this illustrated chapter book series beloved by generations of readers.
The Aldens take a train journey! And at every stop, someone has something to say about the train car the children are riding in. It turns out Caboose Number 777 has an unusual past—one that comes...

"In the town of Sleepy Hollow, the Aldens discover an old legend that's come back to life! Their friend's ghost-tour business is being disrupted by a spooky figure on horseback who throws pumpkins in the streets and frightens everyone. Has the headless horseman returned to haunt the town? The Boxcar Children must find out before the ghost tours are ruined!"--Jacket flap.

"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?"--Amazon.

"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?"--Amazon.

The Aldens are helping out at a rescue ranch for horses. Jessie's favorite is a beautiful horse named Dragon. When Dragon and other horses disappear from the pasture, the Boxcar children must saddle up for a mystery. What's happening to the horses at the Dare To Dream Ranch?

The Alden's neighbor, Lina, thinks there's treasure hidden in her attic and she wants the Boxcar Children to help her find it. Of course, the children are eager to help search—but it appears they aren't the only ones looking for the treasure.

While on a bicycle trip to their aunt's farm, the four Aldens help solve a mystery.