Freud loved art and collected it. In his London home, you can see the collection that came with him when he fled Vienna: a rich and diverse array of archaeological objects, a Rembrandt print, images of Egypt. His famous book on Leonardo da Vinci is anything but conservative. Making bold claims about Leonardo's sexuality, personality and the way works of art relate to real life, his book on this Renaissance genius is hugely suggestive and stimulating. It's one of the classics on Leonardo and always will be.