I wrote "Using Docker" for O'Reilly recently. My thoughts: - I wouldn't bother with the advance. It was a pitiful amount of money and was paid in instalments that I constantly had to chase. Instead see if you can negotiate a better royalty rate (as your first book, I don't know if this will happen). Supposedly I was lucky to get advance at all, not sure how true that is. - Another commentor mentioned the free books t…
Unless you need the prodding to help you actually get the book done...