Whales, Philip Hoare says, are awesome: the biggest creatures on earth, and, in some ways, the most mysterious. They've been around longer than us but we've only known about them for a short part of our history, and we don't have much idea about what they do in the deeper parts of the ocean. Inspired partly by Herman Melville, Hoare has written a brilliant book which has won the Samuel Johnson Prize for non-fiction. It's a sort of antidote to Moby-Dick. Unlike Captain Ahab, he wishes the great beasts well.