I am happy to say that the book has been publicly announced. Now I really need to finish that last chapter ;-)
Joking aside, it has been quite an endeavor, and it took significantly more time than I originally expected. I started writing it back in June of last year while I was in Belgrade, continued after I moved back to the States, and am finishing it now in Santiago de Chile.
Overall, the experience has been largely positive, and I would recommend it to anyone who is passionate about a particular subject. It was also a huge learning experience, as it forced me to fill in a lot of gaps when it comes to my personal knowledge of Coherence and to really dig dip into the internals in some cases to find out how exactly things work.
Fortunately, I had a great group of people from the Coherence engineering team by my side, who were more than happy to answer my questions and to review the stuff I have written. That kind of help is invaluable, and I want to thank everyone for the help and suggestions they have provided. Thank you guys!
There is still a lot of work to do, but at least I can see the light at the end of a tunnel.