Guardians of the 39 Clues, Dan Cahill and his sister Amy discover that the serum is missing and must race against time to get it back before catastrophe strikes.

As a member of the most powerful family history has ever known, thirteen-year-old Dan Cahill has been shot at, kidnapped, and even thrown into a pit with a deadly snake. He's survived it all due to luck, smarts, and his older sister, Amy, who always sticks by his side.

Jared, Simon, and Mallory Grace, have entered another world without leaving this one.

With Amy and Dan still in pursuit of Pierce, Amy does something unthinkable that sends shockwaves through her family.

With Meg Murry's help, the dragons her six-year-old brother saw in the vegetable garden play an important part in his struggle between life and death.

Once again Abby and her brother Jonah go through the magic mirror in their basement, and this time they find themselves interfering in the Little Mermaid story--and needing to set things right and make sure everyone has a happy ending.

As giants start waking up and destroying everything around their Florida neighborhood, Nick, Laurie, Jules, and Cindy work frantically to find a solution.

Jordan Keppler is looking forward to a nice, quiet day at Carnival World. He may not love the scary rides like his sister, Karla, does, but he'll still go on them with her. But Jordan and Karla are about to experience something much more terrifying. There's a boy in a cage hidden away in a secret part of the park. And he's begging for some food. The sign next to him says "Please do not feed the weirdo". What harm could it do, though? Jordan and Karla...

"With their last adventure just barely over, the Walker kids thought life would finally go back to normal. But things dont remain calm for long... especially when the colossus Fat Jagger turns up in San Francisco Bay--and hes in danger! With the police closing in, the Walkers must figure out how to save their giant friend. When a frost beast is spotted in Santa Rosa--and more mystical creatures start appearing all over America--its soon clear that...

"When the Problims' baby brother, Toot is kidnapped by the evil Cheesebreath, Sal and his siblings set sail on a pirate ship to get him back."--Provided by publisher.