Charles de Saint-Évremond; "Discours sur Épicure" 1613-1703; No idea what it's about and its in French, maybe I need to start a translation if I can't find one online.
Evremond was a very reclusive writer who never allowed to have his works be published unless he had died, but he was a libertine and a student of Gassendi, spending the later half of his life frequenting a hedonist salon.
Lucilio 'Giulio Cesare' Vanini; "De Admirandis" 1616; Full title being "De Admirandis Naturae Reginae Deaeque Mortalium Arcanis" or "On the Marvelous Secrets of Nature, the Queen and Goddess of Mortals"
Vanini, despite being a pantheist, rejected much of Aristotle and sought to explain everything through the teachings of Epicurus and Lucretius, but developed his own view of mechanistic-materialism.