Halo was a BEA book that many many people were very excited for... but until I was hanging around the booth with my roomie April, I hadn't heard anything about it. Apparently the hype was over the cover (which I agree, is gorgeous). That was enough to pull me in, so I got a copy when they were set out at the booth. 
 Several people asked to borrow Halo, so it became one of my first BEA reads. It's a VERY thick book, which was slightly intimidating. Luckily, I really enjoyed myself. 
 With a title like Halo you would expect the plot to be about angels... and you'd be right. I loved reading about the family of angels this book is based on - why they are at Earth, what they are doing, what it's like to be an angel. They even talk about Heaven every once in awhile, but not in a way that ruins anyone's idea of Heaven, which I particularly enjoyed. 
 This book was fairly slow moving as far as action, but I became so invested in the idea behind the angels and their mission that I didn't mind one bit. Some of the plot is slightly predictable, but I didn't mind that either. 
 Halo is part of a trilogy, and I am very happy about that (even though the other books don't come out for months). It's possible I would recommend this book slightly more for those of the Christian faith because of the obvious references, but in now way am I saying you shouldn't read it if you are not in this demographic (you'll see what I mean when you give it a try). 
 Halo is an excellent book that makes you think about angels and their role on Earth. I can't wait for the next book!