Mother Night
"'This day will go down in history!' said Jones.
'Every day goes down in history,' said the boss."
I haven't had the chance to read a Kurt Vonnegut book in quite a long time, and his stories are always something worth coming back to. I picked the above quote because I thought it was a fair encapsulation of this story: every character has this irrevocable depth, which makes none of them particularly deep. The end result for every last character is written on their faces shortly after they are introduced/characterized, and you can expect no one character to exemplify the level of morality or strength they believe themselves to have, one way or the other. Their attitudes and beliefs eventually become perverted and they get punished for it.
Overall this book was just...unsettling. A phenomenal example of Vonnegut's ability to deconstruct truth, justice, hate, and our expectations of the human spirit, while at the same time giving each character the means through which to eat themselves alive.
I'd recommend it, if reading about people falling on their swords is something that interests you.