I must compliment your ability to keep the reader hooked, I had to see what chapters they saw, stalked your website and ended up reading the whole post about your pre sale.
This is pretty off topic but did you test how your book works on an E-Reader? I check a sample chapter and there where a lot of pictures and colors to distinguish information, this will probably not work very well on my Kindle.
The first few chapters, I've been primarily targeting web and not testing on e-readers. I figured that until I knew whether people actually wanted to read it, I should just focus on making the web excerpts look decent and try to avoid over-optimizing for web.
Now that the book is officially a go, the PDF version is a first-class citizen, and I'll be testing e-reader experience on my rm2.
This is pretty off topic but did you test how your book works on an E-Reader? I check a sample chapter and there where a lot of pictures and colors to distinguish information, this will probably not work very well on my Kindle.