The Squid¸ the Cabal¸ and the Old Man
England¸ 1684.
Newton¸ Halley and Hooke. A brilliant scientist seeking gold. A young astronomer seeking glory. An old man seeking vengeance. An early Masonic lodge. A presumable Cabal. An Ancient Inter-Planetary Cult. Squids as Gods. Brains as food. Math treatises. Old scientific artefacts. All in one book.
It's The Squid¸ the Cabal¸ and the Old Man.
For 1st and 2nd level characters using Lamentations of the Flame Princess and other such mechanically old-school adventure role-playing games.