Of the three volumes of the Lord of the Rings, I think the Two Towers is my favourite. The story retains all the qualities of soft myth that make it so wonderful, and begins to delve into the deeper elements of its emotional content and message even as the plots turn towards ever larger and more stereotypically fantastical battles. Following the cast down so many branching plotlines could have been a challenge for a lesser author, but Tolkien makes the divide almost seamless. The branch in Rohan, following Aragorn, Gimli, and Legolas, is probably the plot I most enjoy, but the addition of Gollum to the Ring storyline adds a brilliantly sinister and at the same time hopeful and heartwarming aspect to it. And of course, we get to see even more of the glorious world Tolkien so lovingly crafted for his stories.