Stuart Gibbs

Thirteen-year-old Ben Ripley is assigned to protect the president from an assassination attempt in his first solo mission, but he may be in over his head.

"Teddy Fitzroy, his family, and some other FunJungle employees have been invited to visit a bison ranch just outside Yellowstone National Park that FunJungle's owner, J.J. McCracken, is considering purchasing. But as usual, trouble isn't far behind. The ranch's endangered bison have been mysteriously disappearing. Then a massive local grizzly bear named Sasquatch breaks into the house, causing chaos. In the aftermath, Kandace McCracken discovers that...

"Someone is trying to hunt FunJungle's Asian greater one-horned rhinoceros, and twelve-year-old Teddy Fitzroy is on the case"--

After tracking down incredible discoveries by Einstein and Darwin, Charlie is back. This time, the great ruler Cleopatra has left behind an extremely valuable and powerful treasure, its location encoded on an ancient stone tablet. In 30 BCE, Cleopatra and her husband, Marc Antony, lost their war against Octavian for control of the Egyptian Empire. However, Cleopatra knew Octavian was really after the mysterious item that was the source of all her...

In 2041 on Moon Base Alpha, thirteen-year-old Dash must solve the mystery of how Lars was poisoned before the base loses oxygen, forcing the colonists to return to Earth.

Thirteen-year-old spy in training Ben Ripley is sent to Mexico to try to thwart the evil organization, SPYDER--the CIA's main enemy.

With SPYDER apparently defeated, thirteen-year-old Benjamin Ripley is hoping for some peace at spy school, but when the CIA conference room next to where Ben and Alexander are trying to explain everything to Ben's parents (no easy task) is blown up, suspicion falls on fellow trainee (and secret crush) Erica.

Tim and his friends flee the hazardous Sea of Terror and head toward the city of Atlantis in pursuit of King Neptuna's stolen trident. "Tim, Belinda, Ferkle, and Princess Grace were headed to their doom...until a mythical sea creature came to their rescue. But in exchange for saving their lives, Princess Piscina needs them to bring back something very precious to the Kingdom of Merland: the trident of her father, King Neptuna. To do so, Tim and his...