Instruct: Classify the given Amazon review as either positive or negative.
Query: Truly Engrossing

Tad Williams has managed to create a world even more alive than in the preceeding three volumes. The wonders of Otherland shine in Sea of Silver Light and I had many a late night as I refused to put the book down. The numerous loose ends start to come together early on, much to the benefit of the reader. When the nature of the Other was finally revealed, I set the book down and contemplated the issue. The book raises countless issues; issues not restricted to the fictional world, but applicable to our own. A profound and engrossing novel.The only downside is that the book does not seem to know when to quit. Sure, Williams wanted to wrap up all the loose ends, but his conclusions are less than satisfying and the book could do without the last 75-100 pages.