Lords of the Sith

This is set about 10 years after Return of the Sith and it's really fascinating because you get to see the relationship between Darth Vader and the Emperor. Because the Emperor is constantly expecting Darth to kill him and Vader is basically “yeah I will, but not right now”. Apparently that sort of thing is expected among the Sith. Also you get to see a little bit of Vader being all sad about Padme which is interesting.