I hope to have the first draft complete by summer. I'm planning on pushing out a new chapter every couple weeks, and already have notes and material for four more chapters... Just need to keep writing.

Right now I'm working on a chapter on security, and another on Roles, and will probably publish an updated version next week.

I'm also working on getting one or two really good technical editors, as right now I'm basically doing my own editing as I go, one chapter at a time. Once I feel comfortable with where the book is, I'll be publishing on Amazon so people can get a hard copy.

Have you considered doing an early access program or draft editor list? I would be interested in either if you chose to do so.

I'm publishing as I go on LeanPub; I've written a little about the process so far on Server Check.in[1]. I'll probably work on getting the book on Amazon/Kindle before it's in its '1.0' state, but LeanPub will always have the latest version of the book (including after the '1.0' release).

[1] https://servercheck.in/blog/self-publishing-my-first-technic...