How about a free 2 hour video lesson With Danny Diliberto?
https://www.youtube.com/watch?v=JTkHVnwT9Uw
If you watch this and pay attention, you'll get tons of tips on how to properly play the game.
If you want to buy a tape there is the "Grady Mathews break shots and key balls". Highly recommended. All of Gradys stuff is, btw.
The Mike Sigel video mentioned earlier is also recommended, though the Diliberto video will show you more about how to actually PLAY than the two others. Pay no attention to Danny missing shots. Listen to what he says and in particular pay attention to how he uses protection balls whenever he goes into clusters. This game is more like a "Craft" than many others. You must learn how hard to go into balls and how much spin and power to use. The Diliberto video will show you some of this, the rest you must learn by practise.