There is a lot to like about Redshirts and John Scalzi creates an interesting meta-universe that gives a backstory to all of the disposable extras the filled many an episode of Star Trek. The book pokes fun at a storied television franchise and goes from silly to absurd as the junior crew members do what they can to avoid going on away missions. These crew members are more savvy than the original redshirts and they fully understand their odds of returning from an away mission when they go down to a planet along with more important ship personnel. Seeing things from the perspective of an "extra" is somewhat unique and one inside joke after another keeps things entertaining.
At the crossroads of a gold rush western and science fiction you'll find Alex Lomax, private investigator. Most residents of Mars dream of finding Martian fossils, returning to Earth fabulously wealthy, and virtually immortal in a synthetic body. Alex is a wanted man back on Earth so he's stuck in the one grungy port city Mars has to offer when a dame (synthetic) walks into his office. We have now boarded the roller coaster ride of crosses and double-crosses that makes up Red Planet Blues.
Anyone who has ever played a character in an online game or assumed any kind of persona in a virtual world will identify with this book. Serious MMO players in particular understand the challenge of managing the demands of the real world versus a virtual world and know the perils of trying to live in both at the same time. The two have a way of bleeding together with each having the ability to negatively impact success in the other. Ernest Cline take this concept and creates a virtual utopia known as the OASIS and juxtaposes it against a dystopian society that is in near ruins. Many people live in poverty in the"stacks", which are trailer homes vertically stacked on top of each other, and the only grass they ever see is virtual grass when they are online.