This is the response I got from Alan Farley when I asked about the differences between his course and the book. (this was before the book was released)
"Different approaches to the same information. The course has a lot of audio and I'm real good speaker <g>. The book will have more detail and require more commitment than the course. I'll be coming out with a new course version when the book releases in the fall. It will have about 5 hours of audio as part of the curriculum"
I have not taken the online course, but I did get the book and think highly of it. To be honest, though, I think his best stuff are the free articles on his web site. I can say with certainty that his site has make the greatest impact in my trading of anything I have read. (not that I am a great trader, though)
Good Luck!