This is a gripping book. What Horowitz does really well is that he not only keeps the tension, drama and humour that made Horowitz's children's books so popular, but uses the adult genre to make this book much deeper than his others. The book is about a man named Guy Fletcher who, on hearing a rather horrible joke about a famous actress who died in a car crash, tries to find out where this joke and others like it come from. It isn't long however until Guy gets into serious trouble. Some of the twists in the plot are extremely clever and Horowitz also makes even the more unlikely events in the story seem strangely plausible (as he always effortlessly seems to do). This book is one of the reasons that reading is so enjoyable. It may look like a fairly long book, but it is so intense that you'll read it in a flash (I finished it in 3 days). You might be wondering, why I've given the book 4 stars if it's so good. Well, the ending may be a bit dissatisfying, clever though it is and the book could be about 500 pages longer at the rate at which everyone who picks this book up will storm through it. I would recommend this book to anyone apart from those who can't stand action of any kind in a novel, whether they barely read at all (this will be the one book you finish) or whether your an experienced reader who just likes a gripping book. However, I wouldn't recommend this book to those who are too young i.e younger than 14, due to the adult content in the book (some sex and bad language).