Suggestions for multiple novels in a series?

I’m trying to organize my writing, and I’ve got a series with multiple books, each with multiple chapters. I’d like to just have one Scrivener file for everything. What’s the best way to do this? Any way to do multiple manuscripts, or is it just going to be folders within folders?

This question comes up a bit, if you do some searching around in the forums (particularly in the usage and tips sections) you should find some interesting answers for possible ways of working. We even have a case study written on the topic, featuring Monica McCarty.