Just finished reading "Star Wars: Lost Stars", A really fun read that changes some of my perspective on all the movies in regard to how I see the empire and rebelion. It also sets up Force Awakens in a few ways, most notably the crashing of the Star Destroyer Inflictor into Jakku. I really like how they tried to give the perspective of an imperial officer who saw the empire as a peace keeper, and the rationalization of the destruction of Alderaan as a way to prevent a much more bloody war.
Its a nice read on what happens immediately after ROTJ also, talks about the empire splintering, the new republic forming and how the war didnt end.