Blueeyedboy (Malbry #3) by Joanne Harris

'Once there was a widow with three sons, and their names were Black, Brown and Blue. Black was the eldest; moody and aggressive. Brown was the middle child; timid and dull. But Blue was his mother's favourite. And he was a murderer.'

B.B. is a forty-two-year-old hospital porter still living at home with his mother in a Yorkshire village. His social life is played out online, on a website called badguysrock. There, he stalks Albertine, with whom he shares a troubled past, and spins dark murder fantasies - especially about his mother. As the story of their tortured relationship unravels, so does that of his blood feud with his brothers, the poignant tale of a blind child prodigy, and the poisonous truth lurking in the rotting heart of one disturbed family.

Blueeyedboy is an intricately plotted thriller that plays on the myriad opportunities for disguise, multiple personalities and mind games that are offered by the internet, and shows, in a cascade of heart-stopping twists, how a fantasy life can erupt into the real world with unpredictable and devastating results.