If you liked the Alex Rider books, try these...   Stormbreaker graphic novel Based on the original novel Stormbreaker. Point Blank graphic novel Alex Rider, teenage superspy, infiltrates the mysterious Point Blanc Academy, armed with only a false ID and a set of disguised gadgets. Can he alert the world to what he finds out before it's too late? A.J. Butcher  Spy High series As students at a special high school that trains them to be secret agents, six teenagers struggle to complete the training exercises as a team before being sent out into the field to sink or swim.     Ally Carter  Gallagher Girls series As a sophomore at a secret spy school and the daughter of a former CIA operative, Cammie is sheltered from "normal teenage life" until she meets a local boy while on a class surveillance mission.     Stephen Cole  Thieves Like Us A mysterious benefactor hand-picks a group of teen geniuses to follow a set of clues leading to the secrets of everlasting life, secrets which they must steal and for which they risk being killed.   Cory Doctorow  Little Brother After being interrogated for days by the Department of Homeland Security in the aftermath of a major terrorist attack on San Francisco, California, seventeen-year-old Marcus, released into what is now a police state, decides to use his expertise in computer hacking to set things right. John Feinstein  Last Shot: a Final Four Mystery After winning a basketball reporting contest, eighth graders Stevie and Susan Carol are sent to cover the Final Four tournament, where they discover that a talented player is being blackmailed into throwing the final game.39677200624757 Further reading: Vanishing Act: Mystery at the U.S. Open Carl Hiassen  Flush With their father jailed for sinking a river boat, Noah Underwood and his younger sister, Abbey, must gather evidence that the owner of this floating casino is emptying his bilge tanks into the protected waters around their Florida Keys home.   Charlie Higson  Young Bond series This prequel to the adventures of James Bond, 007, introduces us to the young James when he's just started boarding school in England and is about to become involved in his first adventure. John Marsden  Tomorrow When the War Began Seven Australian teenagers return from a camping trip in the bush to discover that their country has been invaded and they must hide to stay alive.   Robert Muchamore  CHERUB series When James is recently orphaned, he is recruited by a secret agency for his math skills and must undergo one hundred days of grueling training. James Patterson  Maximum Ride series After the mutant Erasers abduct the youngest member of their group, the "birdkids," who are the result of genetic experimentation, take off in pursuit and find themselves struggling to understand their own origins and purpose. Michael Simmons  Finding Lubchenko When his father is framed for murder and bioterrorism, high-school junior Evan, using clues from a stolen laptop, travels from Seattle to Paris with two friends to find the real culprit. Further reading: The Rise of Lubchenko Roland Smith  I, Q series Teenagers Q (Quest) and Angela go on tour with married rockers Blaze and Roger and, while in Philadelphia, become submerged in a world of danger when they discover the identity of Angela's real mother, who is a former Secret Service agent.