Log Horizon

If you liked the anime, you will likely find that this is better. If you felt that the anime was flawed, you may well find that the book is not, or not in the same way.

The story is slow, with a great deal of explanations and musings, especially in the beginning; it's trying to paint an entire world, and that shows. It is the sort of thing that is very difficult to adapt to an animated format. The book, however, was well worth the read.

Only the first volume is out yet, the second to come in July.