I have just finished Ribblestrop by Andy Mulligan. It is one of the best books I have read for ages. Its funny,scary, dramatic, exciting and I couldn't work out what was going to happen next. Try it as soon as you can.
Also in my holiday reading bag was Spirit Hunter by Katy Moran - another great read but completely different. This is set in Ancient China and is an adventure with two main characters who are on opposite sides in a time of struggle; a girl who is from the Horse Tribe and a boy who is a Chinese warrior monk.
Killing God by Kevin Brooks is another great read, told by Dawn Bundy who is fifteen and lives with her mum. She is unattractive and doesn't have any friends. Her dad disappeared two years ago and at the start of the book she is going to kill God!