It used to be that you could count the number of SharePoint books on one hand. Now just the MOSS 2007 books are consuming a lot of space on my shelves. It seems that every few weeks a new MOSS book is released. I am currently reading Inside SharePoint 2007 Administration by Steve Caravajal, Todd Klindt, and Shane Young. I will post more books that made it to my bookshelves, I am quite behind on these posts to be honest.
Here is are a handful that recently made it to my office shelves: