If you’re interested in learning about monism, you’ll probably be interested in Spinoza. Deleuze provides excellent historical context and commentary in the book <i>Spinoza: Practical Philosophy</i> <a href="https://monoskop.org/images/d/d8/Deleuze_Gilles_Spinoza_Practical_Philosophy.pdf" rel="nofollow noreferrer">https://monoskop.org/images/d/d8/Deleuze_Gilles_Spinoza_Prac...</a>