Three complete stories in one collection! Includes The Mystery Girl, The Mystery Cruise, and The Disappearing Friend Mystery. In The Mystery Girl, Henry, Jessie, Violet, and Benny are working in a general store to help out a friend of Aunt Jane’s. It seems to the children that the young girl who works in the store is behaving very strangely. She seems nervous and won’t answer any questions about her past. Then a strange man comes to the store asking about her. What secret is the mystery girl hiding?

This volume includes: The Animal Shelter Mystery, The Old Motel Mystery, and The Mystery of the Hidden Painting. In The Mystery of the Hidden Painting, the Aldens find a mysterious painting hidden in the attic. The children learn that it is a portrait of their grandmother, whom they never knew, wearing the necklace Grandfather gave her when they were married. The necklace disappeared on their first anniversary - and was never found. Can the Boxcar Children track down a necklace missing for so many years? 

 This volume includes: Benny Uncovers a Mystery, The Haunted Cabin Mystery, and The Deserted Library Mystery. In The Haunted Cabin Mystery, the Aldens are going with grandfather to visit his friend, old Cap Lambert, a retired riverboat pilot who lives in a cabin in the woods. To get there, the Boxcar Children take a wonderful trip down the Mississippi in a paddlewheel boat. But when they arrive at Cap Lambert’s cabin, they find some mysterious things are going on. Spooky phone calls, eerie flickering lights, strange dark figures. Is the cabin haunted?

Three complete stories in one collection! Includes The Mystery of the Singing Ghost, The Mystery in the Snow, and The Pizza Mystery.

Three complete stories in one collection! Includes Mystery in the Sand, Mystery Behind the Wall, and Bus Station Mystery. In Mystery in the Sand, the Alden family is spending sunny days at the shore and summer nights in the mobile home right on the beach! One morning, Benny finds a gold necklace in the sand, and a search for its owner begins a trail of clues that leads to Tower House, the strange old mansion nearby. What will the Boxcar Children find there? 

Snowbound Mystery: It’s an unusual winter vacation for the Alden family when a huge snowstorm traps them in the woods! Luckily, the log cabin where they’re staying is cozy - only there are strange noises in the night and a mysterious code is carved into the closet door. The rescue is a long wait for the Boxcar Children, but the cabin is full of secrets. 

The Woodshed Mystery: The Alden children are staying at the New England farmhouse where their grandfather grew up. There are many stories and legends about the old farm, and there’s a woodshed near the house that holds a surprising secret... a secret that dates all the way back to the Revolutionary War! The Lighthouse Mystery: When the Aldens take a summer trip to the New England coast, they have a fun place to stay: a lighthouse! 

Three complete stories in one collection! Includes The Chocolate Sundae Mystery, The Mystery of the Hot Air Balloon, and The Mystery Bookstore.

Mystery Ranch: The Aldens visit their mysterious Aunt Jane at her run-down ranch and make a surprising discovery! Mike's Mystery: A nearby house burns down while the Boxcar Children are staying with their Aunt Jane - and their friend Mike is blamed for starting the fire! Blue Bay Mystery: The Aldens are excited to visit a deserted South Seas island. But soon they discover clues that they are not alone. Is someone on the island watching them?

Three complete stories in one collection! Includes The Canoe Trip Mystery, The Mystery of the Hidden Beach, and The Mystery of the Missing Cat.