Darth Plagueis by James Luceno. "Darth Plagueis, a Sith Lord who knows the Dark Side so well that he has power over life and death, joins forces with his apprentice, one-day emperor Darth Sidious, to try to dominate the whole galaxy.
Star Wars: The Force Awakens (novel) by Alan Dean Foster and read by Marc Thompson - OMG this was amazing. It has music such as the theme and pieces of the score from the films, sound effects and other stuff from the film series. My mind was blown.