Book excerpt: For Gilles Deleuze, time is 'out of joint'. For Michel Serres, it is 'a crumpled handkerchief'. In both of these concepts, explicit references are made to the non-linear dynamics of Chaos and Complexity theory, as well as the New Sciences. The groundbreaking work of these key thinkers has the potential to instigate a radical break from traditional existentialist theories of time and history, affording us the opportunity to view history and historical events as a complex, non-linear system of feedback-loops, couplings and interfaces. In this collection, the first to address the comparative historiographies of Deleuze and Serres, twelve leading experts - including William Connolly, Eugene Holland, Claire Colebrook and Elizabeth Grosz - examine these alternative concepts of time and history, exposing critical arguments in this important and emerging field of research.