Books with a big revelation at the end concerning humanity/religion/historic events/the future of earth etc? Like Dan Brown’s Origin/Da Vinci Code, or like Caldwell and Thomasan’s Rule of Four? (Could be thriller, historic thriller, sci fi)
Like a professor is out chasing the mysteries of a weird phenomenon or event and finds out everything we’ve known about reality is a lie… or a book that has the same vibe as the Nine Billion Names of God.