When Henry's magic teacher, The Amazing Arthur, goes missing right before the Greenfield Magic Shop's annual magic show, Henry and his sibilings look into Arthur's disappearance.

"The Aldens visit the shore in New Jersey and help out at an amusement pier that is rumored to be unsafe"--

"The old abandoned school in Silver City is being fixed up as an art center and the Boxcar Children volunteer to help clean up the place. But the other volunteers are scared by the spooky goings-on in the school--doors lock by themselves, and chalkboard messages appear out of nowhere! Will the Aldens find out the secret of the haunted school?"--

The Aldens investigate the rumors of ghosts, disappearing props and a haunted seat in the Trap-Door Theater.

The Aldens help out at a minor league stadium and investigate when it appears someone in the ballpark is stealing the home team pitcher's signals and relaying them to the batters of the other team.

A local radio station is holding the Great Detective Race, and the Boxcar Children have entered the contest! They solve riddles and search all over town for clues leading to the grand prize. But when some of the clues turn out to be fake, it's clear that someone is playing unfairly! Who could be trying to ruin the race - and why?

Someone is trying to put Aunt Jane's motel out of business, but the Alden children aren't going to let that happen.

The Alden children, isolated in a storm at a small bus station, are led into a mystery centering on a polluted river.

The Boxcar Children investigate a mysterious ghost with a glowing pumpkin head at a friend's farm.

Jessie wants her science fair project to make a difference. So when she gets the chance to test a local creek for pollution, she can't wait to get started. But when things start going wrong with her experiment, Jessie and her siblings don't just have an experiment to investigate, they have a mystery to solve!