Absolutely. Robert Greene's books:
The 48 Laws of Power,
The 33 Strategies of War,
The Art of Seduction,
and
Mastery
All of those links are to free PDF views online, you can download them directly to your computer risk-free, or read them from the internet. I couldn't find a non-downloadble PDF of Mastery. I still recommend you go to your nearest bookstore and support Robert Greene by purchasing his books.
Those books are not truly self-help books, they are psychological studies containing distillations of timeless, fact-based wisdom concerning the topics. The information in those books has helped me tremendously. I am profoundly more confident and secure after bringing the knowledge contained in those books into my life.
Here is a picture I just took of my desk with my copies to prove that I'm not just lobbing sales pitches.
