According to the handy chronology in the front of the book, Lords of the Sith is the first novel to take place after the events of Revenge of the Sith. At the moment, anyway. It does read like the early days in the relationship between the two Darths; which sounds like the name of an 80s sitcom.
After a number of attacks that have slowed spice production on Ryloth, Emperor Palpatine decides that he and Darth Vader should investigate. He also invites Senator Orn Free Taa along for the ride, which pleases him to no end. Cham Syndulla of the Free Ryloth movement gets wind of the visit, so he and his fellow freedom fighters lie in wait. And that’s all you need to know, because I don’t want to spoil it for you.
Author Paul S. Kemp has crafted both an exhilarating story about battles in space and on land; and an engrossing look into the embryonic stages of a newly minted Sith, and his relationship with his master. Much in the way The Clone Wars gives an occasional glimpse into the dark side of the man who would become Darth Vader, Lords of the Sith shows that–for the time being–there is still a bit of Anakin Skywalker behind the mask.
I am not going to rank the Star Wars books that have been released since Lucasfilm was purchased by Disney, because I am not a list making kind of guy. And don’t even get me started on “power rankings.” Bloodline, and the Aftermath trilogy are important for the Star Wars story going forward, and that is where my heart is right now. I am finally getting around to watching The Clone Wars, and I hope to finish the series before Rogue One hits theatres. Or at the very least, before I get to see it–if The Force Awakens is indication. So I guess you can figure out where my head is as I type this. All I know is that Lords of the Sith gives valuable insight into the puppet master who pulled many strings during the first six Star Wars films; and to the dark lord whose presence is still felt today.