Jim Slater, Zulu, PEG and Next PLC got me started. I bought the book and he explained all about Next PLC. How it had become a penny share and how it was undervalued, etc. I followed his logic and came to the conclusion that Next was still undervalued at around 2 pounds--I forget the exact price--but I put, for me, quite a large sum into them. They ended up at 16 pounds, then had a bad year and came back to 8, then went up again. A fantastic buy for me and I followed on with a lot more. bought on the same PEG principle. So, for me, I highly recommend "Zulu" as the best investor's book on the market. I would add that I am not a great follower of accounts, etc. but he put everything in a highly readable style. I never bothered with the sequel as I read that there was not much new in it. However, if it does for you what it did for me I would buy the two!
PS. You'll need a chart data service. I have Sharescope Gold. I have found that that filters the ones that I am looking for very well.