The idea that time does not exist is, for many, unthinkable: time must exist. Almost every experience we have tells us so.There has been plenty of debate around what time is like, but not whether it exists. The goal of this book is to make the absence of time thinkable. Time might not exist. Beginning with an empirically flavoured examination of the 'folk' concept of time, the book explores the implications this has for our understanding of agency, and the extent to which our best physics and best metaphysics are compatible with a timeless conception of reality.