In the seventh book in the New York Times bestselling Spy School series, Ben Ripley is finally going to take SPYDER down, once and for all. Stranded in Mexico after nearly capturing the leaders of SPYDER, thirteen-year-old Ben Ripley desperately needs a shower. But even more so, he and his spy school friends need to come up with a new plan to defeat their enemies; their only clue a key that opens...something. The mission: Go rogue from the CIA, join up with the British MI6 to locate the leader of SPYDER, the enigmatic Mr. E, and bring down the evil organization once and for all. Only it won't be easy. They'll have to deal with rival evil splinter factions, devious double-crosses, and learning to drive on the opposite side of the road. But they have no other choice: this is their last chance to crack the code on SPYDER.