Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they investigate the mystery of a curious train caboose in this illustrated chapter book series beloved by generations of readers.
The Aldens take a train journey! And at every stop, someone has something to say about the train car the children are riding in. It turns out Caboose Number 777 has an unusual past—one that comes...

Nothing is what it seems and there's always more than one side to the story as a group of strangers trapped in an inn slowly reveal their secrets in this new standalone mystery set in the world of the best-selling Greenglass House.

"When Colin finds a shoebox full of letters hidden in a stranger's attic, he knows he's supposed to throw them away. That's his summer job, getting rid of junk. But Colin wants to rescue the letters--and find out what really happened to best friends Rosemary and Toby way back in the 1970s. Meanwhile, across town, Nevaeh also finds a mysterious letter. But this one reads like a confession to a crime. And Nevaeh knows her father, the 'Junk King,' expects...

When the children uncover a strange puzzle in a friend's back yard, it's the start of a "spy game" leading to gold. But first they must make sense of an old photo and a riddle, and learn just who is behind this mystery within a mystery.

"Conscripted into the dangerous Adventurers Guild, best friends Zed and Brock must defend what is left of humanity against terrible monsters in this epic fantasy."--

Sly the Sleuth, also known as Sylvia, solves three mysteries for her friends and neighbors, all involving pets, through her detective agency, Sleuth for Hire.

After years in foster care, April gets to live in a mansion where she and four other children are caught up in a mystery related to a missing heir, a lost legacy, and the Phantom.

Winston and his friends enter an all-day puzzle contest to win fifty-thousand dollars for their school, but they must also figure out who is trying to keep them from winning. Puzzles for the reader to solve are included throughout the text.

Haunted after helping her father on his ghost-themed Chicago bus tour, twelve-year-old Claire must discover what the spectral boy from the bus wants before it is too late.

When lonely Ravani Foster discovers his new friend Virginia and her six mysterious runaway companions are in danger, he must fight to keep them safe, or lose the only person who has ever understood him. In the dead of night, a truck arrives in Slaughterville, a small town curiously named after its windowless slaughterhouse. Seven mysterious kids with suitcases step out of the vehicle and into an abandoned home on a dead-end street, looking over their...