Gilles Deleuze is widely regarded as one of the major postwar proponents of Nietzchean thought in continental philosophy. Over a period of 40 years, he presented what amounts to a philosophy of multiplicity, bringing together concepts from Nietzsche and English thinkers such as Hume. In this study, John Marks offers a reading of a complex, abstract and often perplexing body of work, examining not only Deleuze's philosophical writings, but also the political and aesthetic preoccupations which underpinned his work. Marks provides a rigorous reading of Deleuze's early studies of Hume, Neitzsche, Kant, Bergson and Spinoza, his collaborations with Felix Guattari, and the development of a distinctively "Deleuzian" conceptual framework. He explores the friendship that developed between Deleuze and Foucault, and looks at the full range of Deleuze's writings on literature, art and cinema.