It's called "The Blind Side" by Michael Lewis (same guy that wrote Moneyball).

It's about Left Tackle (and a lot more as you'll find if you read it). If you've read any of his books you know it's a great read despite what seems an obscure subject matter. The guy could be writing a book called "Dirt" and make it interesting.

Left Tackles protect "the blind side" of any right handed QB. Minimum requirements for an NFL quality one is 6-5 350lbs, unusually large hands, unusually long arms and the athletiscism of an NBA power forward. It's a rare combination.

O line was one of the lowest paying NFL positions until Lawrence Taylor showed up and proved what could happen to a QB if you didn't have huge athletic men protecting them. Think Joe Theisman.

Left Tackles, on average, have the 2nd highest pay in the NFL.

Who would have have thought?