Nice! I am in the process of a similar project that I am releasing for free on a collaborative publishing platform called Penflip. I am actively looking for contributors if you know anyone who would be interested :) twitter handle is in my profile.
Excellent book. I didn't, and couldn't put it down since I downloaded it today noon. Almost done reading it. I plan to finish this part of the book before I go to sleep!
Looking forward to the next batch of chapters.
God sent.