Plato in 90 Minutes by Paul Strathern provides a concise biography of Plato, contextualising his life within the broader history of philosophy. It explores Plato's early ambitions, his relationship with Socrates, and his travels. The text also examines Plato's Theory of Forms, his political philosophy as exemplified in The Republic, and the lasting impact of his ideas on subsequent philosophical and political thought. Key quotes from Plato's works are included alongside a chronology of significant philosophical events. The author contrasts Plato's ideas with those of pre-Socratic thinkers, particularly Pythagoras, highlighting the influence of Pythagoreanism on Plato's philosophy.