Relates the exploits of the four Alden children as they locate a missing man. The Boxcar children travel to Maine, take canoes into the wilderness and live in a house exactly like the one on Surprise Island, except the Maine house is brown, not yellow. They then untangle the mystery of the two houses.

Henry, Jessie, Violet, and Benny Alden are on another summer trip to visit Aunt Jane at Mystery Ranch. They're thrilled to find their friend Mike Wood lives in the bustling new town near the ranch. But one night, Mike's house burns down and he is blamed for starting the fire!

Peter finds himself stuck with Fudge & Sheila the Cootie Queen for three whole weeks! Will Peter be able to survive the summer? It may not be the vacation of his dreams, but is certainly won't be dull!

Guided by a magic rhyme, Jack and Annie travel to ancient Baghdad on a mission to help the Caliph disseminate wisdom to the world.

When Jack and Annie travel back in time to Galveston, Texas, on September 8, 1900, they find themselves facing a horrific storm that resulted in the worst natural disaster in US history.

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

It's no secret that Judy wants to be like Elizabeth Blackwell, the first woman doctor, when she grows up. So when class 3T starts to study the Amazing Human Body, Judy can hardly wait to begin her better-than-best-ever third-grade projects: show and tell with something way rarer than a scab, a real-live, ooey-gooey operation, and a cloning experiment that may create double trouble for Judy and her friends.

"Marisol loves to paint. So when her teacher asks her to help make a mural for the school library, she can't wait to begin! But wait-how can Marisol ever make a sky without blue paint? After gazing out the bus window and watching from her porch as day turns into night, she closes her eyes and starts to dream"--

The Alden children travel on a Mississippi paddle-wheel steamer to visit an old family friend in his cabin near Hannibal, Missouri, and try to discover who is responsible for the mysterious activities near the house.

Their magic tree house takes Annie and Jack to Pompeii just as Vesuvius is about to erupt, and they must find a Roman scroll before everything is covered with burning ash.