In The War of the Ring Christopher Tolkien takes up the story of the writing of The Lord of the Rings with the Battle of Helm's Deep and the drowning of Isengard by the Ents. This is followed by an account of how Frodo, Sam and Gollum were finally brought to the Pass of Kirith Ungol, at which point J.R.R. Tolkien wrote at the time: 'I have got the hero into such a fix that not even an author will be able to extricate him without labour and difficulty'....