Gertrude Chandler Warner

Henry, Jessie, Violet, and Benny are excited to learn more about raptors when they volunteer at a rehab center for wild birds, but not long after they arrive, a series of strange events makes it seem like someone might be trying to sabotage the center.

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

"Henry, Jessie, Violet, and Benny are on a train from Boston to San Francisco. Even though they used to live in a boxcar, this is the first time they've ridden a real, moving train. And they find a mystery to solve even before they leave the station. Is someone trying to steal a young woman's portfolio? Could it be the porter? Or is it the tall, bearded man who always wears sunglasses -- even at night? What's in the portfolio, anyway? Can the Boxcar...

"The town of Greenfield is having an art contest to celebrate the work of local artists, and the Boxcar Children are right in the middle of things. They’re getting to know the artists and the gallery owner and learning all about art. But a mysterious note makes them realize that not everything about the world of art is as it seems. Could the gallery be filled with stolen paintings or counterfeit art?" --publisher's website

The children are staying at the home of a famous inventor who was known for her one-of-a-kind clocks. All the clocks make noise--especially at midnight, when there are enough chimes, gongs, and clangs to wake up the whole house. But the clocks aren't the only sound in the house at midnight. Someone--or something--is making a mysterious tapping sound. Who could be inventing trouble in the old house?

"The Aldens start a helper service with their new friend, Beth, to raise money for the Greenfield Hospital! But Beth keeps disappearing when it’s time to help. Then someone tears down their signs and lets the air out of their bike tires. Who would want to sabotage their fund-raiser?" --publisher's website

Four orphans take shelter in an old, red boxcar during a storm, and, determined to make it on their own, they turn it into a safe, cozy home.

When the Alden siblings go camping on Padre Island, they help save a rare type of sea turtle from a mysterious sabotager.

While visiting a friend in New York City, the Aldens investigate the theft of a valuable diamond.

While visiting an old mansion, the Aldens investigate the possibility that it may be haunted.