Summer vacation on an almost private island gives the Aldens a challenge. Henry, Jessie, Violet and Benny used to live alone in a boxcar. Now they have a home with their grandfather and are spending the summer on their own private island. There is a mysterious stranger on the island with a secret--but that's not the only surprise in store for the Boxcar Children.

Violet and Jessie begin an adventure out West when they journey to Centerville to keep Aunt Jane company on the family ranch.

"When the Aldens visit their cousins, they're in for a surprise--there's an amusement park nearby! It has everything they could ask for, with plenty of rides and games. But the children see strange lights coming from the closed park at night. And then a mysterious phone call warns them to stay away! Just what is going on at the amusement park?"--P. [4] of cover.

"Henry, Jessie, Violet, and Benny have a fun new job: fixing up an old castle! The spooky old place will be turned into a museum, but first the Aldens must figure out why so many odd things keep happening. Keys go missing, strange music comes from a deserted tower, and soon the Boxcar Children discover the castle has a amazing secret!"--P. [4] of cover.

The Alden children, who are spending the summer in a lighthouse on the New England coast, are disturbed by a mysterious woman walking the lighthouse grounds.

The four Alden children and their new friend Lars uncover a mystery during a trip to an island in the South Seas.