The fine folks at Foreign Policy have released a new ebook on the happenings in Cairo and the fall of the Mubarak regime. It's called Revolution in the Arab World: Tunisia, Egypt, And the Unmaking of an Era, and you can hit that link to buy it on Kindle, or hit this one to buy it via Paypal.
I've got mine already. As an aside, I wish more organizations would present collections like this of their material in responding to stories of this magnitude - by the time a traditional book would go to press, much of this information would be far less useful, or lost in the shifting sands of Google searches.