Who would want to read a novel, let alone make a film, about a disabled kid living in Swindon, he asks, evincing a mixture of surprise and pleasure. The same could be said about Yann Martel's Life of Pi, a novel about a shipwrecked boy adrift on a life raft in the middle of the Pacific with a starving tiger. The reason that both novels connect with readers of different ages is that they tell simple but powerful stories and they pose the biggest puzzle of all: What is life all about?