Just PUA related or general NLP Techniques and such ?
If you're going for PUA related; well, Dave Riker's material is supposed to be pretty thorough breakdown of SS techniques, though I haven't really dedicated myself to studying it.
IN10SE and a little by Hypnotica is about all the directly PUA related NLP-material I've poked my nose into.
Hypnotica is mostly Inner Game related, but then again; Inner Game is probably the most important part of the Game, in my opinion.
Other than that it's just about sprinkling a little embedded commands and such at the right areas, which is covered by Hypnotists and NLP-practitioners, and of course, by Jeffries and SS... so then you're back at Ross, and Dave Riker (who has an organized approach to RJ's material.)
If you're going for NLP in general, which is what I'd choose, I'd start with stuff by Bandler... one of his latest , "a Guide to trance-formations", is really good.
Other than that I can recommend getting your hands on diverse books in relation to both the field of NLP and the field of Hypnosis.
Over to another detail; I think there's already a stickied topic on this...
