It’s a funny thing, humour. What makes you laugh out loud may leave me with a face like an Easter Island statue. In my own experience the funniest books are non-fiction, and most of these are biographies. There really is nothing so strange or funny as real people. If I had to present my case, then Exhibit A would surely be Bernard Wasserstein’s The Secret Lives of Trebitsch Lincoln (1988), the extraordinary, meticulous, marvellously funny biography of a man who was – well, what exactly?