Billy Dickens discovers that his mysterious father lives in Montana, so this summer Billy will fly across the country, hike a mountain, float a river, dodge a grizzly bear, shoot down a spy drone, and save his own father.

Fourteen-year-old Alex continues his work as a spy for the British MI6, investigating an exclusive school for boys in the French Alps.

Teen spy Alex Rider is sent to a maximum security facility in Gibraltar to impersonate Julius Grief while seeking information about a new criminal organization called Nightshade.

Growing up in 1943 war-torn England, thirteen-year-old Alice and her older sister Louise are members of a centuries-old spy clan, but when Louise decides to spy for the enemy, their bond is changed forever.

Presented with an unexpected assignment, Alex Rider's greatest nemesis, Yassen Gregoravich, recalls his life and the path that led him to become an assassin while his one-time friend, Alex's uncle, became a spy.

While participating in The Challenge at Briar Academy, Abby and friends learn that their nemesis is using Briar as headquarters for planning an attack, and that The Ghost has inside help.

Middle schoolers Florian and Margaret are determined to catch a spy who is implicating their FBI supervisor, Marcus Rivers, in a variety of crimes--even if they have to break into, and out of, the Library of Congress to do it.

In this third book in the exceptional Curiosity House mystery series by bestselling author Lauren Oliver and mysterious recluse H. C. Chester, four children must uncover the evil Nicholas Rattigan's newest dastardly scheme, wage war with a rival freak show, and deal with a spy who may have infiltrated their happy home. Sam, Philippa, Thomas, and Max have just started to recover from their capture and subsequent escape from Rattigan. But the children's...

Soon after being recruited by the mysterious Mrs. Boudica to join a secret military intelligence operation, Josie, Mae, and Akiko discover their superhero abilities and use them to thwart a Nazi plot to steal the ENIAC computer.

Cammie O'Reilly is an unusual kid with an even more unusual home life. She hangs out with a flamboyant black shoplifter named Boo Boo, her housekeeper is a sullen arsonist named Eloda Pupko, and she lives above the entrance of a prison where her dad is the warden. Trying to cope with the death of her mother, who died saving Cammie's life, causes Cammie to become a depressed, angry tween, driven mad by her life in prison. The more Cammie tries to figure...