The Boxcar Children discover an old wedding photograph and a riddle while on a visit at a neighbor's house, and they embark on a spy game designed by the house's original owner.

The Alden children set out to solve the mystery of who is trying to steal Mama Tova's secret cupcake recipe.

The Alden children save an old woman's house, land, and all the animals in her animal shelter from greedy contractors.

"The Aldens spend the summer on Grandfather’s island! Joe, the island’s friendly handyman, helps them with anything they need, but as the children continue to explore their summer home, they realize there is more to the island—and to their new friend—than meets the eye." --publisher's website

The Alden kids investigate a series of break-ins and vandalization at the local recycling center, where Mrs. MacGregor has recently shown them they can find a lot of great things.

The Aldens investigate when a new store called the Game Spot opens in town and neighboring shops are robbed.

"Henry, Jessie, Violet, and Benny used to live alone in a boxcar. Now they have a home with their grandfather, and they're going to a comic book convention! The Alden children are searching for a rare comic book of their favorite superhero, Captain Fantastic. When they finally find the comic, they discover something else, too: a strange note inside, 'signed' by the comic's creator. The Aldens soon realize the note is a fake. But when they start to...

While staying at the Winding River Lodge, the Alden siblings investigate tales of a zombie haunting a lake in the woods.

"This autumn adventure for the Boxcar Children takes the Aldens to a New England farm that has more than its share of strange occurrences. Every year at the Beckett farm, visitors come to buy pumpkins and go on hayrides, but this year something is haunting the farm―a mysterious specter with a glowing pumpkin head that warns guests to stay away! It’s up to the Aldens to find out who―or what―is behind the scare." --publisher's website.

The Boxcar Children investigate the secret of the clock tower at Goldwin University.