Humans have screwed Earth and the only option is to rush outwards into the stars, ad astra per aspera style. Oh wait, you’ve heard this one? Synthetic Eden really hopes you haven’t. Alexander Titus and Sean Platt have crafted a space colonization narrative that isn’t so much planetary romance as it is planetary horror, with a side order of social breakdown thriller. It has its moments, and I kept reading until the end because I…