Noah and his friends in the Secret Society join forces with four teens known as the Descenders to try to protect the Secret Zoo hidden below the Clarksville City Zoo from monstrous sasquatches and the evil Shadow Master.

When Laura Sibbie starts a club called Pig City, she incites a near-war among her sixth-grade classmates and generates the creation of a rival club that has designs on Pig City's precious box of secrets.

Noah and his friends follow a trail of mysterious clues to uncover a secret behind the walls of the Clarksville City Zoo--a secret that must be protected at all costs.

Andi and her brother wind up with nine stray dogs that need homes but must be kept a secret.

When twelve-year-old Hugo, an orphan living and repairing clocks within the walls of a Paris train station in 1931, meets a mysterious toyseller and his goddaughter, his undercover life and his biggest secret are jeopardized.

When Frank and Joe Hardy put a stop to the alarming, but mostly harmless, pranks of amateur moviemaker Seth Diller, a series of more dangerous copycat pranks leads them to a criminal group called the Red Arrow.

The Greystone kids thought they knew. Chess has always been the protector over his younger siblings, Emma loves math, and Finn does what Finn does best--acting silly and being adored. They've been a happy family, just the three of them and their mom.But everything changes when reports of three kidnapped children reach the Greystone kids, and they're shocked by the startling similarities between themselves and these complete strangers. The other kids...

After his father's death, seventh-grader Sam West is whisked from Louisiana to Oklahoma, where he discovers a mysterious tree trunk that leads to a world where Pa is still alive.

Twelve-year-old twins Nick and Eryn investigate why their mother and new stepfather are keeping secrets, why they are forbidden to meet their stepsiblings, and, most important, why their lives are in danger.

"When Moonwatcher, a young NightWing with secret powers, begins school at the academy started by the dragonets of destiny after the end of the war, she soon realizes that someone is attacking the students. Moon must choose whether to help or continue to hide her gifts"--