Hi,
If you haven't already read it, 'The Game' by Neil Strauss (Style) is the way many people (myself included) found out about the
PUA community. Its not really a skills or technique based book, more about someone joining the
PUA community, but I found the first half of the book very useful as it outlines some of the methods and teachings of come of the pro's - Mystery, Style, Ross Jefferies etc - and shows the differences between how some of them work. From this you can pick specific techniques or approaches you like the look of and then read up on those e.g. Ross Jefferies uses a lot of Neurolinguistic programming techniques which may or may not appeal to you