Okay, here: have you ever heard of the philosophy book Gödel, Escher, Bach, by Douglas Hofstadter? Mind blowing stuff about consciousness and computers and stuff that I understood about 1/18th of, maybe, but it was a lot of fun (and made me feel smart every time I understood a sentence!). Reading The Darkness Outside Us makes me want to go back and read that book.
That is not going to convince you to read this novel. Try again.
Trapped in a spaceship with an enemy and an AI that sounds like your mother: how long would it take you to go insane? This book plays with some familiar sci-fi tropes, layers in a life-or-death mystery, adds a sweet, weird love story (can't tell you why it's weird: too spoilery), and sends you on a mind trip of epic twistiness. It's fun, it has feels, it punches you in the gut, it makes you say, "But, wait ... no, hang on a minute: what??!" not just once but probably four or five times, and then it makes you go, "Huh. That's ... huh. There's a metaphor in here; let me think about this for a while."
And so here I am, a week later, still thinking about it and trying to get you to read the book so we can think about it together!