I didn't really like the book The Knife of Never Letting Go. The setting wasn't very fleshed out or detailed, and all the drama and stuff felt really forced. Like, so in this far future we found another planet we can colonize. Instead of spending year researching and studying it before even sending unmanned probes there, we decide to launch thousands of people there with just a basic idea of what it might be like? "What if this so far in the future that tons of planets have been colonized and FTL travel is the norm?" is what you might say, but the only two planets mentioned are Old World and New World, and I'm assuming Old World is Earth.
        Now, this could be so far into the future that humanity might have broken up from a united empire into some kind of system of scattered factions, and maybe some event led to the loss of much of humanity's knowledge on some of these far flung planets, leading them to regress into some kind of techno barbarism. However, these are a lot of assumptions, and the more likely answer is that the author is bad at world building. Just terrible.