"When the doorbell rings three in the morning it's never good news."
The quote could be taken from Ian Fleming, but in fact it is the opening line of Stormbreaker, the first novel in Anthony Horowitz's globally successful Alex Rider series. The echo of Fleming is notable for two reasons: firstly, Alex is a teenage spy who's saved the world nearly as many times as James Bond (13 times and counting).
Secondly, the stories are played totally straight: Horowitz saw himself as writing "an adult book for kids" and Alex's world is no less dangerous or brutal than Bond's. The stakes are high -- Stormbreaker involves the attempted genocide of British schoolchildren, and that's one of the more grounded entries in that there isn't a nuclear bomb -- and the body count higher still.