If you haven’t read “Magicians of the Gods” you might enjoy it. There’s some stuff that’s a little “out there” but the general idea of a cyclic cataclysmic even

If you haven’t read “Magicians of the Gods” you might enjoy it. There’s some stuff that’s a little “out there” but the general idea of a cyclic cataclysmic event with a ~12K year periodicity seems to have some merit.