When I had a (frustrating) chat with chatgpt:
For the “Collapsing Sun” vibe specifically
- The Secret of the Golden Flower (translated by Thomas Cleary) — Taoist meditation text about light turning inward, circulation, and rebirth. Very close in spirit to your description.
- Mystical Qabalah by Dion Fortune — the Tree of Life mapped as inward contraction and ascent; gives structural context for implosion → rebirth cycles.