So while searching on audible I found this book and its confuseing to me why someone would think its a good idea to release the third book of there series without anything else aside from major spoilers people are going to be really mad if they dont realise its the third book https://www.audible.com/pd/Sci-Fi-F...f=a_search_c4_1_1_srTtl?qid=1507007596&sr=1-1
As a belated response, sometimes it's about rights to different products. Additionally, Audible productions cost way more on top of "simple" ebook publishing. I mean, yeah, context will be way off.