Asterisk Guide - Books, Training and elearning about VoIP and Asterisk

I have been working in the newer version of the OpenSER book (Building a SIP provider with SIP).  Well, it is ready and sent to the editor. I believe in January or February it will be published. It was one of the hardest things I have ever done. Sometimes it took me days to write a few lines. The newer version uses OpenSER 1.2.2 and we will cover SerMyAdmin a new project we had started on Sourceforge.