they're all good, Hold on to your nuts and No More Mr.Nice Guy stand out as the ones that helped me the most, but you'll get something different from each one of those and collectively you'll learn alot, some of them will be an eye opener - alot of what you will learn will be counter-intuitive to what you've known all your life and you won't believe some of it but trust me, it's an education you've been missing out on for quite some time.