<p>J.R.R. Tolkien arguably changed the sort of things we read and write more profoundly than any other twentieth-century writer. When The Lord of the Rings was published, Tolkien was in his early sixties; beneath the outwardly unremarkable life of an Oxford don, his imaginative life was richly nourished by his professional interests. Now in paperback, this is the first biography to deal fully with the wealth of Tolkien's posthumously published ma...