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#4: Lords of the Sith by Paul S Kemp – To be honest this is one I have not yet picked up.  However, I have heard enough credible sources put this book routinely in their top 3 that I felt I had to include it and at a significant rank.  This book takes place just following the events of Revenge of the Sith.  Vader is new and still figuring out who he is.  He and Palpatine travel to the planet Ryloth, home of the Twi’leks, to put down an insurrection.  The two Sith must decide what their real relationship will be, or lose everything.