If I'm understanding correctly, there exists a book that teaches 'something', and you want to create site that provides tuition based on the concepts discussed in the book? If so, the author of the book cannot copyright the concepts discussed in the book, only his particular execution. That said, if your site is simply 'converting' his execution into a different medium, there most likely would be an argument for possible infringement, even if you are not actually using the actual text or images from the book. It's not something you can really answer fully in a forum post, it's far too complex. You may be fine, you my not be, you'd have to sit down with an IP expert and go through some examples of what you intend doing.
If it were me, I'd take a different approach. Contact the author and work with him - tell him you love his work and want to help teach it to a different audience in a different medium - that way you get his official blessing and it gives you more credibility, plus he can help you improve your course. You'll probably have to give him a cut of the profits or purchase a license etc, but you'll probably earn 10 times more from the site if you worked with the guy who actually wrote the book your site is about.
Either way, start saving up for a lawyer to sort out the legal side for you