I’ve been listening to Peace on Earth, by Stanislaw Lem and the character has had his right and left brain split. It’s quite interesting so far, and deals with a lot of philosophical questions like ‘is it me inside my head, if i don’t know what it’s thinking?’ So far the plot seems to be that he saw something he shouldn’t have, but only his right brain has the memories (the side of his brain that is his subconscious side, not his conscious side, so he doesn’t have direct access to it.) People seem to want to interrogate that side of him, but are unsure how.
There are real examples of people with their brains split, and images shown to one eye not being perceived by the conscious mind… it’s a strange thing to think about, and I am enjoying this book a lot so far!