I just finished the Little Book of Value Investing by Chris Browne of tweedy brown. its one of the most instructive books on the art of value I have ever read...covers the reason to invest this was and goes into great detail on how to separate the winners from the value traps. He also covers the ins and outs of applying the value appraoch on a global basis..one of the best books on value investing I have read in a long time
When you do scans to pick out value stocks, you get different answers on the same stock. So scan are you going to believe.