This book is an overview of Søren Kierkegaard's life and philosophical ideas, primarily drawing from Paul Strathern's "Kierkegaard in 90 Minutes." Strathern's book provides a concise biography and analysis of Kierkegaard's work, focusing on his unique approach to philosophy, which emphasizes individual subjective experience and the "problem of existence." The text details Kierkegaard's unconventional life, his complex relationship with his father and Regina Olsen, and his development of existentialist thought, contrasting his views with those of preceding philosophers like Plato and Hegel. Finally, it highlights Kierkegaard's influence on later existentialists like Sartre and Heidegger, while also providing a chronology of his life and relevant historical events.