I'm starting this thread again because the first one ended way too early and for no good reason. Brian Crist's book; "Poolology" is absolutely genius and maybe the best $10 (ebook) you'll ever spend for a book with the purpose of helping you make shots at the game of pocket pool. This is a work that you can read the first few chapters and instantly put it to use on the table. There is no pivoting, and he doesn't ask you to come down on a center cue ball aimed at something mysterious like other systems. Brian has just figured out the pool table mathematically and how to take advantage of it. Brian merely shows you how depending on the OB's location on the table and the CB to OB alignment with the table's diamonds, the fractional hit to pocket the ball. Buy the book, read the book and try it out. You will not be disappointed!