Corvus is an enchanting book. There is no sentimentality here - indeed, Esther Woolfson goes to rigorous lengths to avoid anthropomorphism - and yet the entire book is infused with warmth, charm and humanity, whilst the birds themselves - very much the stars of the piece - are quite wonderful. The episodic narrative, charting the author's own journey of avian experience and discovery - punctuated by digressions on topics such as birds in folklore, bird physiology, bird evolution, bird flight and bird song - is completely compelling: I could barely put it down. The expositions themselves are equally interesting, hugely informed and informing, but never daunting. Beautifully written, the prose is spare but elegant, seemingly almost taking on the metre of bird song itself. Other significant themes also run, almost imperceptibly, through the book: the art of 'seeing' and observation, the scientific method, the idea of 'North', the comfort of home and family. This is not a 'heavy' book - it first came to my attention through hearing a very brief extract on (BBC) Radio 4 - but there is great sensitivity and wisdom here. If you've ever stood at a window or sat on a bench and watched a bird walk or hop or feed or fly, then Corvus will almost certainly enrich your life and provide a fresh, new perspective the next time you see a rook, crow, magpie or one of their feathered relations. A joy from cover to cover.