Was about to post this. The Hyperion saga is an absolute must for hard SF freaks. If you like the three body problem, you’ll love this too. The 4D creature men

Was about to post this. The Hyperion saga is an absolute must for hard SF freaks. If you like the three body problem, you’ll love this too. The 4D creature mentioned by parent is amazing. There are more 4D puzzles like a temple moving back through time.