I have been planning to write a book on Appcelerator Titanium and Phonegap for last six months. This time I am not going to publish it through any publishing company. I want to do some crowd sourcing for a nice TOC and I will publish each of these chapters as PDF as soon they are done, for free.
I hope it will be cool to write a boon in open-source style, free as in beer, free as in freedom. Wish me good luck.