Ape Man over at Subnova was able to find a copy of Halo: The Fall Of Reach at his local Waldenbooks. Ape Man hasn't read too much of the book, but what he has read is awesome . He also hints at something:

Most exciting thing to learn about Halo so far? I'll just give you a date: 2535. Make of that what you will.

You can stress your brain a whole lot or just wait until the book is released on October 30. Order yours for $6.99 at Amazon.