If you like fantasy novels about immortal cultivation, the book " Heaven's End " might suit your taste. It tells the story of a legendary path against the heavens and the arduous immortal cultivation. In addition, I also recommend a Xianxia novel," The Ancestor of Dao and Human Emperor," which is also a story of a modern man crossing through the primeval era. In it, various cultivation systems competed to bloom in the primeval era. I hope you like these recommendations.