Brian Clegg is an author of popular science books, including The God Effect, A Brief History of Infinity, How to Build a Time Machine and Inflight Science. He has written for many publications from The Wall Street Journal and the Times to Playboy and Nature. He lives in Wiltshire, England with his wife, twin daughters and golden retriever.
He doesn't know it yet, but fourteen-year-old Davy Taylor is about to have the worst day of his life.
Coming home from school, he collapses in the street. More pain than he'd ever thought possible... a brain haemorrhage? Is he dying? He staggers home. Surely his parents can help? But they're gone. The flat's empty. He's alone.
And then the voice in his head starts talking.