"Berkeley in 90 Minutes" by Paul Strathern, part of his "Philosophers in 90 Minutes" series, examines the life and work of George Berkeley, an Irish philosopher known for his idealist philosophy, which posits that the existence of material objects depends solely on their perception by a mind, ultimately leading to the idea that a God who continuously perceives the world sustains its existence. The book also touches on Berkeley's thoughts on the nature of mathematics, science, and economics, placing them within the context of the intellectual and political landscape of his time.
