I noticed there is no "About The Expanse" page, so this information doesn't really fit anywhere else and I wanted to put it here. There is this great article on Barnes and Nobles that was written around the time "The Expanse" was being developed for television and "Cibola Burn" had been released. Its an in-depth article about the history of the series from its humble beginnings in Ty Franck's mind, how it evolved into an online forum-based game, grabbed the attention of Daniel Abraham and became a collaboration and instant hit for the two.
It would be nice if we could incorporate the information directly into the wiki somewhere as a page of information in case the article ever gets taken down, but right now it doesn't fit anywhere on the nav.
Be aware there are spoilers within the article about the books written at the time (and "Cibola Burn" was being released), but it is a fascinating read.
andnoble.com/blog/sci-fi-fantasy/the-evolution-of-james-s-a-coreys-space-epic-the-expanse