Skeleton Keyby Anthony Horowitz
While on an almost-innocent mission to keep an eye on the Wimbldon tennis championships, Alex gets on the wrong side of a Chinese triad gang and gets sent on another 'easy' mission to get out of the way, babysitting a pair of non-too clued-up CIA agents who need to look like a family while they investigate The General.
The General likes WMDs, obviously, and isn't bothered too much about rubbing out inconvenient associates, or anyone else for that matter, although he does have a soft spot for boys like Alex.
And Alex of course thinks nothing of taking him on single-handedly, underwater, in the monster's lair, and in the air.
Seeing as how I usually get stung for these books to the tune of £7 each at Christmastime, we were quite pleased to pick up Skeleton Key and Eagle Strike for only £2 at a Watford charity shop.