In the guilty pleasures department, I read 'Death Star' by Michael Reaves and Steve Perry. It's perfect for anyone who came out of Clerks pondering "So what did happen to the sub-contractors." Unsurprisingly, the model for the Empire's procurement and construction is Fascist Italy.
Right now, I'm reading Charles Stross' 'The Jennifer Morgue' which features his Bob Howard, magician-hacker intelligence operative, character. Imagine James Bond in a world where H.P. Lovecraft's works are non-fiction. Computer Science leads directly into hacking into neighboring realities, where the inhabitant are frequently extremely unpleasant. As in, saving throw required to see if you go insane just from looking at them.
Also, on audio during drives, I'm listening to Amity Schlaes 'The Forgotten Man.' Probably the most important history book published in the last several years as it debunks a lot of myths about the Depression.