I’m not a cat person. But this is a book about the world’s favourite pet, by John Bradshaw, a world expert. So I picked it up. What I dreaded, I realised, was sentimentality. But this is clear and scientific. It’s a book about the evolution of the mammal we’re most familiar with. Bradshaw tells us that all cats, including lions, are descended from “a medium-sized cat-like animal”, called Pseudaelurus, which lived in central Asia 11 million years ago. After this came a cat diaspora — this Asian cat spread to Africa, where it evolved into the caracal and the serval, and to North America, where it became “the bobcat, lynx and puma”. And now look.