What books should I get from the library?

I don't know if your library has it, but The Night Angel Trilogy by Brent Weeks was really good. It was definitely realistic without overdoing it. I'm not sure if it's really sci-fi so much as alternate fantasy? It's hard to clify the genre, but it's basically about ins, except they're called something else in the story because they're supposed to be better than mere assassins. The first book is called The Way of Shadows, the second is Shadow's Edge, and the third is Beyond the Shadows. Ok, so I just searched it and it looks like your library doesn't have it, but I'd still recommend reading it.