I went back to get this last week. About two or three weeks ago I saw it in the Oxfam bookshop, Instagrammed it but left it on the shelf. It haunted me so the next time I was in the neighbourhood, I secured it with two and a half pounds. Published in the mid-sixties, the cover design is, sadly, uncredited. 'Sadly' because it's been so thoughtfully crafted, I'd love to know who did it: The way that type on the cover lines up and then how it's stacked on the spine; the ever so clever diagrammatical design; the careful choice of colours…so thoughtful.