The man behind Coaching Kristy (still probably the best Novice Player level video series ever made on the game) finally got around to collecting these thoughts into one volume. It's not the most advanced theory work you'll ever encounter, but it's solid info and depending on where your game stands, you'll either find a wealth of good reminders or some sharp new angles for approaching the game.
In my opinion, this is one of the few truly essential books on the game to read. It's not for beginners but if you're past the basics, you're apt to find something useful here.