Rene Descartes spent most of his childhood in solitude, a situation that also came to characterize his adult life. Fortunately, these countless lonely hours helped Descartes produce the declaration that changed all philosophy: I think, therefore I am. Eventually convincing himself to doubt and disregard sensory knowledge, Descartes found he could prove his existence through his thoughts. This internal information, he believed, was the true reality and external forces were hopelessly deceiving.

Paul Strathern earned a degree in philosophy at Trinity College, Dublin, and has lectured in philosophy and mathematics. A Somerset Maugham prize winner, he has written books on history, philosophy, and travel as well as five novels. His articles have appeared in numerous publications, including the Observer (London) and the Irish Times. He lives and writes in London.

Earphones Awards recipient Robert Whitfield was born in England and worked for the BBC for ten years as a radio news announcer and also worked as a narrator for the Royal National Institute for the Blind in London. In addition to narrating for Blackstone Audiobooks, he involves himself in numerous stage-acting projects in the United States and Europe.