Good introduction to Spinoza by way of Lordon's astute critique of the concept of Marxist telos. He questions the existence of alienation (you are never empty, you are occupied by/filled with something be it positive or negative), doubts the power of simply "seizing the means of production", and troubles the water on the often casually bandied about (espesh by me!) Leftist concepts of liberation and revolution. It is a short but challenging read and makes a good companion piece to something like Graeber's Bullshit Jobs.