Because they live on an island laced with rivers, ponds and streams, the British are obsessive anglers. Fishermen – and most of them are men – make up a large but secretive society cut off from the rest of us by strange language, obscure controversies and complex motives. Most books about angling are written for specialists: coarse fishers, fly-fishers, sea-fishers. But in Blood Knots (2010) Luke Jennings has broken with convention and employed his great gift for words to explain to baffled outsiders what angling is really about. This is a memoir written for everyone.