Skeleton Key by Anthony Horowitz

Alew thinks he's going to have a nice and easy vacation. Not having to do any spy business, while his fake parents do it for him. He thought that his job was clear. He would only have to act like their child for a while so that they would not get caught. He could mess around all he wanted. He was on vacation. When his "parents" go out to find an entrance underwater in a cave, they say that they'll be back in 20 minutes. When they haven't gotten back for 45 minutes, Alex starts to be suspicious. When he swims down to find them, he will meet some unfriendly guests. This book is for children ages 10 and older. It has 264 pages and is an action and spy book. I would rate this book a 4 out of 5 stars.