The Boxcar Children are on the houseboat and they may have to fight for it because someone wants it.

The Aldens are visiting Grandfather's friend Billie, who owns a fish camp in Alligator Swamp. One night Benny sees something in the swamp that no one can explain. Could it be the ghost of Gator Ann - a long-dead alligator - come back to haunt the swamp?

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...

While visiting Pikesville, the Boxcar Children join the exciting last games of the season in a strange old ballpark behind an abandoned factory. But the Eagles are hitting too many home runs. Could they be cheating? Then Violet sees strange lights in the factory. Could the lights--and the home run streak--have anything to do with the sad Pikesville legend of Home Run Herman?

Following clues provided by the secretive Reddimus Society, the four Alden siblings travel to a dingo sanctuary in Australia and to Shakleton's hut in Antarctica to deliver the fifth and sixth artifacts, and then they work to unmask the traitor traveling with them.

Four orphaned and homeless siblings happen upon an abandoned boxcar, which, with a little creativity and hard work, they gradually furnish with all the comforts of home. Fearful that they will be sent to live with the reputedly cruel grandfather they have never met, the children keep their new home a secret.

4-in-1 sampler featuring the first book in four classic young reader series