What is the nature of temporal passage-the movement of events or moments of time from the future through the present into the past? Is the future and the past as real as the present, or is the present-or perhaps the present and the past-all that exists? What role, if any, does language play in giving us an insight into temporal reality? Is it possible to travel through time into distant regions of the future or the past? What accounts for the direction of time, the sense we have that we are moving toward the future and not back into the past? What is the relation between the physics of time and the philosophy of time?

These are the kind of dizzying questions that have been addressed by metaphysicians since antiquity, and time has remained a critical concept for many thinkers and philosophers since then (for instance, in his Confessions, St Augustine, restating an observation by Plotinus, wrote: 'So what is time? If no one asks me, I know; if I seek to explain it, I do not'). Interest in the subject has also been enduring-and has blossomed anew in the past century.

The Philosophy of Time is a new title in the Routledge series, Critical Concepts in Philosophy. It meets the need for an authoritative reference work to make sense of the subject's vast literature and the continuing explosion in research output. Edited by L. Nathan Oaklander, a leading scholar in the philosophy of time, this new Major Work from Routledge brings together in four volumes the canonical and the very best cutting-edge scholarship in the field to provide a synoptic view of all the key issues and current debates.

With a comprehensive introduction to the collection, newly written by the editor, which places the collected material in its historical and intellectual context, The Philosophy of Time is an essential work of reference and is destined to be valued by philosophers of time-as well as those working in related areas of philosophy of science, philosophy of mind, and philosophy of religion-as a vital research resource.