Deleuze's concept of 'becoming' provides the key to his notoriously complex metaphysics, yet it has not been systematized until now. Bankston tracks the concept of becoming and its underlying temporal processes across Deleuze's writings, arguing that expressions of becoming(s) appear in two modes of temporality: an appropriation of Nietzsche's eternal return (the becoming of the event), and Bergsonian duration (the becoming of sensation). Overturning the criticisms launched by Zizek and Badiou, with conceptual encounters between Bergson, Nietzsche, Leibniz, Borges, Klossowski, and Proust, the newly charted concept of double becoming provides a roadmap to the totality of Deleuze's philosophy. Bankston systematizes Deleuze's multi-mirrored universe where form and content infinitely refract in a vital kaleidoscope of becoming.