Jedi vs Sith
Surprisingly good story, surprisingly good aesthetics (space Renaissance so literal Jedi Knights), and fantastic art throughout.
Basic plot is about the last battles between the Jedi and the Sith and how the Rule of Two came about under Darth Bane. I highly suggest you read it for yourself other than knowing that.
It got somewhat adapted in the first two Darth Bane novels, but I always preferred the comic's interpretation.