Hello. Good start. I like the logo.
In my personal opinion, I don't really like sites that have a one page design with a long message w/ large fonts, underlining, and different colored headers to market a product. I'm not sure how well these types of sites perform in sales conversions but I personally dislike sites that look like this because they remind me of all those get rich quick scam sites.
I recommend creating multiple pages, like an About page explaining exactly what the book is and what the reader will learn from it. You can also have a Testimonials page, but please do not do what get rich quick scam sites do and place a series of testimonials on the front page.
You are also using many outdated HTML elements like font. Try using CSS or p style="color:colorcodehere;" instead of font color="red".
Good luck!