When Max's parents leave the country without him, he must rely on his wits to get by, and before long he is running his own--rather unusual--business.

The members of Club CSI must use their digital forensics skills to discover who ran up a credit card bill on Whitney's account by playing an online game without her consent.

Hannah and her Club CSI friends investigate when her dog, Molly, disappears from the backyard shortly after winning the neighborhood dog show.

In 1918, caring for her family's homing pigeons while her father is away fighting in World War I, twelve-year-old Pam comes to suspect that a mysterious stranger in her small North Carolina town is a German spy.

In the aftermath of the 1906 San Francisco earthquake, twelve-year-old Clara finds a baby left on the doorstep of her family's boarding house, and sets out to unravel the surrounding mysteries.

While volunteering as a magazine delivery girl in a convalescent hospital during the Second World War, Molly uncovers a mystery involving the theft of rationed food supplies for sale on the black market.

"Rebecca Zamolo is on a mission to save her summer. Instead of going to camp like she'd planned, she's been stuck in summer school. But today is the day! She's going to present her final science assignment--using her Nana's borrowed vintage zoetrope--and then she'll be free to have fun. But as Becca and her classmates wait for her teacher to arrive, a menacing voice comes over the intercom claiming to be the Game Master! The kids quickly discover...

The Alden children, snowbound in a vacation cabin, discover adventure in surrounding wild life, three children they find in the snow, and a search for a lost recipe.

SoHo, 1981. Twelve-year-old Olympia is an artist -- and in her neighborhood, that's normal. Her dad and his business partner Apollo bring antique paintings back to life, while her mother makes intricate sculptures in a corner of their loft, leaving Ollie to roam the streets of New York with her best friends Richard and Alex, drawing everything that catches her eye. Then everything falls apart. Ollie's dad disappears in the middle of the night, leaving...

Throughout the hunt for the 39 Clues, Amy and Dan Cahill have uncovered history's greatest mysteries and their family's deadliest secrets. But are they ready to face the truth about the Cahills and the key to their unmatched power? After a whirlwind race that's taken them across five continents, Amy and Dan face the most the difficult challenge yet -- a task no Cahill dared to imagine. When faced with a choice that could change the future of the world,...