The Aldens have joined Dr. Iris Perez as she investigates legendary creatures around the world. In this adventure, the children investigate what might be living in the deep trench off the coast of Puerto Rico. From manatees to mermaids to sea monsters, creatures of the sea have been attracting tourists to the area for years. But when a man on a nearby island goes missing, it's up to the Aldens to sort out fact from fiction.

The Aldens are joining Dr. Iris Perez as she investigates legendary creatures around the world. In the last leg of the journey, the children travel to the Amazon Rain Forest. They love learning about all the different plants and animals they have never seen before. But is there really a creature in the forest that hasn't yet been discovered?

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.

The Aldens head to Ladakh, a territory in northern India, to help save the elusive and critically endangered snow leopard.

"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?" --

The Aldens try out a Halloween escape room. The puzzle are fun to solve. But when eerie events start scaring people away, the children find a much bigger case to crack.

The Great Detective Race: The local radio station is putting on the Great Detective Race, where contestants must solve riddles and search all over Greenfield for clues leading to the grand prize. The Aldens sign up, and soon they're following the riddles' clues all over town. The Ghost at the Drive-In Movie: The Aldens are visiting a friend who owns a drive-in movie. The children love to eat popcorn in the car and watch movies under the stars. But...

#143 The Celebrity Cat Caper: Walter the Cat is a star, but is he too famous for his own good? The Boxcar Children must find out who's trying to ruin this cat's career! #144 Hidden in the Haunted School: Does a ghost live in the deserted hallways of Hawthorne School? It's up to the Boxcar Children to uncover the old school's secrets! #145 The Election Day Dilemma: Cousin Alice is running for mayor, and the Boxcar Children must find out which of...

The Sword of the Silver Knight: A Medieval Fair has come to town, and the Aldens get grandfather's permission to volunteer their time. Benny becomes a page to the Silver Knight, a top suspect when the valuable antique sword used in the fair goes missing. The Game Store Mystery: When a new store called the Game Spot opens in their town, the Aldens are thrilled. But it's not fun and games when the other stores at Crossroads mall are robbed. What's more,...

The Growling Bear Mystery: The Aldens love exploring the many hiking trails around Yellowstone, especially Lost Cabin Trail. But suddenly, the trail is closed because of bear activity, and then the map disappears! Could someone be trying to keep the Aldens away from the trail? It's a mystery-and the Boxcar Children are going to solve it! The Mystery of the Lake Monster: When the Aldens arrive at Lake Lucille, they're excited to explore the forests...