Gilles Deleuze is among the twentieth-century's most important philosophers of difference. The style of his extended oeuvre is so extremely dense and cryptic that reading and appreciating it require an unusual degree of openness and a willingness to enter a complicated but extremely rich system of thought. The abundant debates with and references to a variety of authors of many different domains; the sophisticated conceptual framework; the creation of new concepts and the injection of existing concepts with new meanings - all this makes his oeuvre difficult to grasp.