A book review of Bookworm by Lucy Mangan. Bookworm by Lucy Mangan has a sub title; A Memoir of Childhood Reading. It’s a perfect description for an almost perfect book. A book that’s delightful, witty, interesting and unadulteratedly opinionated. It’s the kind of book that you’ll read again and again. I’ve already read it twice—and I shall read it again. Lucy Mangan is a self-confessed bookworm and loner; always…