The best material will vary a bit for your personality:
David Wygant has a lot of good advice on natural and day game.
David DeAngelo brings together a lot of different people in his interview series.
Mystery is a bit technical but offers some great advice on storytelling and just about anything.
Neil Strauss has had success and provides his own view.
We offer a lot of
Seductionadvice at
Attractology. Read what you can, don't go overboard on it and get out to where you will be meeting people regularly. The quickest way to learn is to get the experience and see where you fail, then come back to get past a specific stopping point.