Hi David, I honestly think that getting yourself immersed in the Racing Post every day is at least as good a way as anything else. At first, you'll understand very little of it, but it's only really an acclimatisation exercise, and the more you read it the more you'll understand it. It will also help you to judge for yourself which direction to take next, rather than relying on others' recommendations which might not really be right for you. Having said that, a few book recommendations (all widely available, inexpensive and useful):
Alan Potts: "Against The Crowd"
Alan Potts: "The Inside Track - The Professional Approach"
Nick Mordin: "Winning Without Thinking"
Nick Mordin: "Betting For A Living"