The Weavemaker is another great installation of the Tapestry series. Parts of book 1 are summarized in this book, but if you haven't read the first one, you may be a little confused. Even though this is a complete story in itself, I suggest reading the first book before this so you understand the background.
Saul the demon is back trying to get control of the human world, while Clara and her friends aim to prevent him from the world's destruction. If you've ever read the Biblical Revelation of John, many of the apocalypse references will make sense to you -- although the book is far from a religious story.
There is plenty of gore to keep horror fans happy. But there's also a mix of fantasy that adds a nice twist to the story.