if you're in college, Conquer Your Campus is not bad. Get the book of Pook. 48 Laws of Power, How to Become an Alpha Male (John Alexander), Mystery's Revelation
Be very careful with stuff like the Mystery method, etc. It has its moments, however, most guys focus far too much on all these clever lines and routines and rules. Some of that stuff can help you, but you're better off focusing on improving your body language, fitness, attitude, experience, wardrobe, etc. There is some "theoretical' stuff that is important to get into your system, but ultimately experience is the best tool. That being said, i've had times where i go out consistently and get shot down and no results, and end up feeling hopeless. In these moments it can be very helpful to read up on material, get some confidence,and educate yourself a bit.