Four-Dimensionalism : An Ontology of Persistence and Time, Paperback by Sider, Theodore, ISBN 0199263523, ISBN-13 9780199263523, Brand New, Free shipping in the US

Lucid, absorbing, and original, this book defends the theory that the material world is composed of temporal as well as spatial parts. Along the way, it addresses many topics on the metaphysics of time and identity. These include the status of past and future objects, the nature of motion and change, the existence of composite objects, and examples involving two things in the same place at the same time.