I loved this book, I went through it twice. The step by step advice Napoleon Hill gives is mind-blowing, many people are skeptical of his philosophy but it is rare to find someone to follow his regime to the fine details. He even mentions many complain that after reading this book nothing happened, he said of course nothings going to happen if you just read it, you must act upon what I said and follow through with it. It truly is a life-changing book, I still have to implement eveyrthing he said to do.
You should check out his other two book too: The Law of Success, Outwitting the Devil
These three books in total all feel like one long book split into three parts, read outwitting the devil last and the law of success first. Thats the manner I see them to be ordered, in outwitting the devil he shows you how to implement the lessons into your life through a conversation he had with the devil, ahaha it sounds crazy but trust me its amazing!