When the Aldens come across a robbery at an antique store, they decide to use their detective skills to help locate the stolen ruby ring, bracelet, and necklace. Yet before their investigation even begins, someone breaks into the Aldens' home and steals a box of Benny's favorite Silver Frosted Star cereal!

The Boxcar Children try to find the monster that lives in the mountain lake.

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 Aldens travel to Everglades National Park to help find a park ranger who has been missing for days. However, everyone they talk to seems angry and secretive instead of worried. Henry, Jessie, Violet, and Benny are determined to solve this mystery, even if it means following the trail deep into the spooky Everglades.

The Aldens are excited to visit their friend, Seymour Curtis, who lives on a farm that's rumored to be haunted! When they arrive, they learn that valuable antiques have gone missing. Is the thief someone who Seymour knows? Or is it a ghost seeking revenge? The Boxcar Children have another mystery to solve!

While on the beach at a seaside resort, Benny finds a bottle with a tattered piece of paper inside. When the Aldens find out that it’s part of a map that leads to a pirate’s riches, they prepare to search for the buried gold. But the Aldens aren’t the only ones looking for the hidden fortune. Will they be the first to solve the mystery of the pirate’s map? Aye, mateys, this might be the Boxcar Children’s biggest adventure yet.

The Boxcar Children are going to college! That is, they are going to Mountvale College to help Grandfather at a convention of young astronomers. The Aldens learn many interesting things, and get to look at the stars and planets through a telescope at the observatory. But then some valuable information disappears - along with one of the students at the convention. What's going on? It's another mystery for the Boxcar Children!

The Aldens are all on the same soccer team, and know that winning isn't as important as having fun. But is someone trying to ruin the soccer league? Practice balls get deflated, a goalie's gloves are ruined, and a player is locked in the locker room during an important game. What's going on?

The Aldens are thrilled to be with their Aunt Jane and Uncle Andy in San Francisco. When they visit Fisherman's Wharf, their friend, Charlie, invites them aboard a fishing boat. But strange things are happening on the wharf, and it seems as if someone doesn't want Charlie to catch any fish. Can the Boxcar Children find out what's going on?

The Aldens are visiting the Alamo with their grandfather. They arrive at the Alamo to find that a movie is being made there - and they are going to be in it. But then things start to go wrong on the movie set, and a priceless ring from the Alamo Museum disappears. Are the two things connected? It is up to the Boxcar Children to solve this new puzzle

The Aldens are helping out at Penny's Emporium, a novelty shop in the mall. But soon everything starts to go wrong! Merchandise disappears, and doors start locking mysteriously. What's going on at the Hope Harbor Mall?

When the Aldens hear that Grandfather's friend Mrs. Ashleigh had an ancestor who was a pirate, they decide to hunt for his hidden treasure. But then strange things start to happen, and it looks like someone else wants to find the treasure - and keep it! Can the Boxcar Children stop the thief before the next hurricane hits?

The Boxcar Children love exploring the train, watching the beautiful scenery from the observation car, and eating in the dining car. But the train ride gets really interesting when they meet a young woman who has had something very valuable stolen from her.

Henry, Jessie, Violet, and Benny are happy to share their home with Katya, the young gymnast, and watch her practice for the big competition. When things start going wrong at the gym, it quickly becomes clear that someone is trying to ruin Katya's chances of winning...but who? The Aldens want to help. The trouble is Katya's been acting a little mysterious herself - almost as if she's got something to hide. But what? Can the Boxcar Children solve both mysteries before the big competition?

Grandfather has just bought a plot of land in the Rocky Mountains - complete with a ghost town! When the Aldens hear their land is haunted, they don't believe it. But when they see a ghostly figure on the main street, they know something's up. There's a mystery here, and the Aldens are determined to solve it!