I just finished listening to Memoirs Found in a Bathtub by Stanislaw Lem. It was recommended to me by someone long ago, but I can't remember who. All I can say is WTF!?! Fortunately, Wikipedia has a better summary:
Set in the distant future, Memoirs Found in a Bathtub is the horrifying first-hand account of a bureaucratic agent trapped deep within the subterranean bowels of a vast underground military complex. In a Kafkaesque maelstrom of terrifying confusion and utter insanity, this man must attempt to follow his mission directives of conducting an "on-the-spot investigation. Verify. Search. Destroy. Incite. Inform. Over and out. On the nth day nth hour sector n subsector n rendezvous with N."
The narrator inhabits a paranoid dystopia where nothing is as it seems, chaos seems to rule all events, and everyone is deeply suspicious of everyone else. In danger of losing his mind, the protagonist starts keeping a diary, and it is this diary which details only a few days in his life that is ultimately found by a future society and given the title Notes from the Neogene. Memoirs Found in a Bathtub is this distant voice from the past, this Notes from the Neogene.
Here's a quote from the book:
"I'll tell you. You're young, but you're one of us, and I'm one of us, so I'll tell you. Everything. Now, say someone's one of us. . . but he's also—you know—you can tell, right?"
"He's not—one of us," I said.
"Right! You can tell! But sometimes—you can't tell. You think someone's one of us, but they got to him and then he wasn't any more—and then we got to him, and he was—but he still has to look like he isn't, that is, like he only looks like he is! But they get wise to him and—now he isn't again, but he has to look like he isn't—or we'll get wise—and that's a triple!"