I *think* that most of us who visit this board have more or less given up on later (from 4e onwards) editions. You'll find much more info about 6e over on the official forum:
https://forums.shadowruntabletop.com/index.phpI'd imagine that you can find many of the official novels as PDF on Drivethru, and they can't cost much - that's probably the cheapest way to familiarise yourself with the metaplot.