Funny enough ABW, I just finished reading "With Wings Like Eagles" yesterday! Picked it up at Borders for a read while travelling. To be honest, I didn't get alot from it, but it would serve as a good intro to the BoB. It is less about actual air combat and more about the politics and war strategy pursued by English and Germany, including the importance of Radar and Fighter Control in the battle. Gives proper credit to Dowding for success.
In that regard it puts together all the pieces of Dowding's strategy and makes it understandable to the reader why the Brit's made the decisions the way they did, and how this affected the outcome.
You could could get a similar understanding by watching BoB the movie which covers all the highlight's in the book, in a couple of hours. If you haven't see that movie, it would hold your interest reasonable well.
cheers
Peter