"Azincourt" by Bernard Cornwell.
I was a bit tired of reading thrillers (which I usually pick when I'm bored and at the book store) so I picked up this book.
Hey, it can't be a bad book when it's about people shooting other people in the head with bows! (Also, it's the English killing the French. Whoop!)
This is probably the first historical book I've picked up out of free will, but it's quite fun to read.
Before Azincourt I read "Angels&Demons" by Dan Brown. That book was pretty sweet.