If you’re looking for something to read, check out these book suggestions from Ask Reddit.
1. One that really stuck with me was The Long Walk by Stephen King writing as Richard Bachman.
I think just because it’s rather intensely focused on survival as a competition (100 young men, 18 years old, walking continuously until there’s only one left. The others will die of exhaustion or breaking rules, one of which is a minimum speed limit that must constantly be maintained) and the psychological effects of that on the contestants.
2. Gerald’s Game is a great book, but it also made me want to throw up.
3. House of Leaves by Mark Z. Danielewski is a long read but a solid contender to be considered one of the most unsettling, dark novels I’ve read.