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

The Boxcar children and their grandfather are visiting Hawaii. They help pick pineapples on their cousin Mary's plantation, go snorkeling, and visit a volcano. But they can't figure out why no one will tell them the legend of the black pearl.

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 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 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 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!

While Tate Radison was filming his last movie, a lot of odd things happened. So he wants to keep his presence in Greenfield a secret to avoid any more mishaps. But soon the troubles start again. Why would someone want to ruin Tate's career? It's another mystery for the Boxcar Children!

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 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 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 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.

The Aldens are helping their grandfather organize Greenfield's Winter Festival. When the Boxcar Children get a roll of photos developed, they find a secret message hidden in one of them. They are baffled, and things become even more mysterious when they realize that someone is trying to ruin the Winter Festival by tearing down the decorations and stealing a local statue! There must be a connection between the message and everything that is going wrong.

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 Aldens are going on a trip to the Arizona desert. There they learn about the legend of the Lost Dutchman Mine. Everyone thinks the mine is filled with gold. Can the Boxcar Children find out if the legend is true - and if it is, who will find the gold?

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?