Stuart Gibbs

After getting expelled from spy school for accidentally shooting a live mortar into the principal's office, thirteen-year-old Ben finds himself recruited by evil crime organization SPYDER.

As almost thirteen-year-old Ben, a student at the CIA's academy for future intelligence agents, prepares to go to spy summer camp, he receives a death threat from the evil organization SPYDER.

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.

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.

In 2041 twelve-year-old Dashiell Gibson is a resident of Moon Base Alpha, and at the moment he is faced with a number of problems: coping with the nasty Sjoberg twins, finding out how the commander of the base has managed to disappear from a facility no bigger than a soccer field, and dealing with the alien Zan who communicates with him telepathically from afar--and who is hiding a secret which may threaten the whole Earth.

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...

With no knightly experience but plenty of pluck and an impressive vocabulary, a twelve-year-old peasant, hoping to improve his station in life, volunteers to help a cowardly prince and his not very powerful wizard rescue a princess from an evil, foul-smelling monster.

Twelve-year-old Teddy Fitzroy is the prime suspect when FunJungle's newly-acquired koala goes missing, thanks to a prank staged by middle school bully Vance Jessup.

Twelve-year-old Teddy investigates when a popular Texas zoo's star attraction--Henry the hippopotamus--is murdered.

The CIA forces twelve-year-old Charlotte "Charlie" Thorne, a rebellious genius, to use her code-breaking skills on an epic global chase to locate Einstein's last equation before dangerous agents discover it and unlock the solution to harnessing energy.