"Cage Rat: Lessons From a Life in Baseball by the Yankees Hitting Coach" by (not surprisingly) Yankees hitting coach Kevin Long, is roughly one-half autobiography, one-half hitting manual. Which you prefer depends on, well, which is more in your wheelhouse.
Me? I prefer the autobiography part. Long's life story is one of perseverance. He played in the minor leagues for 10 years, reaching the Triple-A level from 1992 through 1996 but never getting a sniff of the big leagues while in the Royals organization, and then he coached in the minors for another 10 years before the Yankees promoted him to major-league hitting coach for the 2007 season.
The hitting stuff is pretty cool, too, though, and you read it knowing that he has established himself as one of the industry's best at what he does.
And now I'll give my copy of this book to the first person who e-mails me - at email@example.com - with the correct answer to this question:
Who was the last Yankees player to win an American League batting title?
--Here are the contest rules.
--UPDATE, 2:41 p.m.: We have a winner! Blog old-timer Tim N. knew that Bernie Williams was the last Yankee to win an AL batting title. He did so in 1998.