The Wasp Factory was first published in 1984, although I seem to remember hearing that it was written slightly earlier, when the authour was in his teens. It instantly catapulted Iain Banks to fame, where he's stayed as one of Britain's top authors, publishing at least one book a year since. I'm probably giving away too much by saying that the story has a great twist in it, but hopefully that will make you read it.
This sample quote is from the main character, Frank, a 16 year old in Scotland who narrates the story:
Two years after I killed Blyth I murdered my young brother Paul, for quite different and more fundemental reasons than I'd disposed of Blyth, and then a year after that I did for my young cousin Esmerelda, more or less on a whim. That's my score to date. Three. I haven't killed anybody for years, and don't intend to ever again.
It was just a stage I was going through