I've said it in every other post about these books so far, but I will say it again: you should read The Lord of the Rings. If you haven't read them, then a) I'm very sorry for the sad life you have heretofore lived, and b) you should read them immediately. If you have read them, then you should reread them. These are the kinds of books that spoil you for everything else that isn't nearly half as good as they are.
At the end of The Two Towers, if you're not familiar with the plot already, you'd probably believe that this story is not going to end well. Of course, the biggest spoiler of this book is its own title, which Tolkien did not pick. His original choice for the title of the third part of The Lord of the Rings was The War of the Ring, but he was persuaded to change it to the more positive, and arguably more descriptive, The Return of the King. Knowing this history, I'm not entirely certain which title I prefer. However, I am entirely certain that I enjoyed this part of the story just as much as the others.
As I said in my review of The Hobbit, during this reread I was surprised by how light that novel is; I suspect that my memory of its tone from my last reading was affected by my intermediate viewing of the movies. Or, perhaps I was merely linking it with the core Lord of the Rings books, which very quickly take on a markedly different tone from their prequel (and yes, I know that technically there is just one "book," which was split into three parts for the convenience of readers and publishers). The implications of a darker turn are heavy throughout even the early chapters of The Fellowship of the Ring, but are pivotally confirmed with the events of the chapter A Knife in the Dark.
Finally, I am undertaking my re-read of The Hobbit and The Lord of the Rings. There are certain books that are always worth re-reading, no matter how many times I may have read them before, and these most definitely make that list. Since this is the first time I'm re-reading them since I started posting reviews here on the site, I think it is only appropriate that I go ahead and review them here. In the case of The Lord of the Rings, I usually try to do a re-read every four or five years, since the first time I read them back in third grade. We'll see if I decide to re-read and post a review for The Silmarillion, too.
No, I'm not above using cliche titles, when they serve me. Because I'm so very fond of stirring up controversy, I'm going to talk about something that divides more people than religion, politics, or the Great Pumpkin: movie/book adaptations. Fair warning: we're going to talk about some big name franchises, including Harry Potter, Star Wars, The Lord of the Rings, Star Trek, Jurassic Park, and others, so if you don't want to risk potential spoilers from either the book or movie versions of any of these, you might not want to read this post. Otherwise, let's mire ourselves in controversy.