The whole process to get to this book done, I would say around 3 to 4 years total. The first 3 years being mainly playtesting (alot) and iteration, keeping track of the changes (and why). Slowly fleshing out a complete design, and then writing the damn thing!
The last year was making the book, mainly drawing all the illustrations, making the book as pretty as I could.
As to the ‘‘authorpromote’’, well you have to start somewhere!