"Siblings Henry, Jessie, Violet, and Benny used to live in a boxcar. Now they have adventures everywhere they go. What secrets will the children find on their very own island?"--

Dink, Josh, and Ruth Rose help catch the thieves who have stolen the treasure from the museum's mummy exhibit.

Reports of zombies and grave-robbers alarm the people of a Louisiana swampland village, but Ruth Rose, Josh, and Dink begin to suspect that the supernatural may not be the cause of the eerie occurrences.

When the Mystery Machine gets a flat tire, the only place to stop is a creepyold castle. The man who owns the castle is having a dinner party and invites the gang, but an unexpected visitor shows up-- a ghost!

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.

"In her chapter book debut, Nancy Clancy must find the culprit when a prized possession goes missing at school"--Provided by publisher.

Baby Monkey, private eye, will investigate stolen jewels, missing pizzas, and other mysteries--if he can manage to figure out how to put his pants on.

Kitty wants to be a superhero like her mother, once she gets over her fear of the dark, but when Figaro the cat needs help she springs into action.

A young Canadian visitor helps the Alden family solve a mystery involving a lost coin collection.

While visiting Wallis's castle, Dink and his friends investigate strange noises that lead them to a dangerous secret.