I just finished reading Hans Kmoch's "Pawn Power in Chess", a fantastic book based entirely on pawn formations, and the importance of these formations in the various stages in the game. An especially important read if you are interested in the various facets of the endgame. The only problem I had with these books is that Kmoch made up a bunch of weird terms to describe common pawn formations, solely for the purpose of this book. This is easily forgiven since it makes referencing said formations much easier for the author and the reader. A great read for all chess players.
I'm also working my way through "Japanese for Everyone", published by GAKKEN; an instructional textbook, but quite enjoyable to read, and a lot less dry than other texts I have read that teach Japanese.
I also recently finished reading volume 3 of "The Art of Computer Programming", the book on sorting and searching. Needless to say, this book is quite complex and I will have to reread it after brushing up on my permutation mathematics, however I still thoroughly enjoyed this book.
I'm also reading Wilbur Smith's "The Seventh Scroll"; I would recommend any of this author's books.