Early Life: The book explores Ramanujan's humble beginnings in a small village in South India and his early fascination with mathematics.

Self-Taught Genius: Ramanujan was largely self-taught in mathematics and displayed extraordinary mathematical abilities from a young age, despite lacking formal training.

Mathematical Contributions: The book highlights Ramanujan's groundbreaking contributions to number theory, infinite series, and other areas of mathematics, many of which continue to be studied and applied today.

Collaboration with G.H. Hardy: Ramanujan's collaboration with the British mathematician G.H. Hardy is a central focus of the book, showcasing the intellectual exchange and friendship between the two scholars.

Challenges Faced: Ramanujan faced numerous challenges, including racism, cultural differences, and health issues, during his time in England.

Recognition and Awards: Despite these challenges, Ramanujan's work eventually gained recognition, leading to numerous awards and honors, including fellowship in the Royal Society.

Illness and Return to India: Ramanujan's health deteriorated during his time in England, and he returned to India, where he continued to work on mathematics until his untimely death at a young age.

Legacy: The book explores Ramanujan's lasting legacy in mathematics and his influence on future generations of mathematicians, both in India and around the world.

Cultural Impact: Ramanujan's life story has had a significant cultural impact, inspiring books, films, and other creative works that celebrate his achievements and contributions to mathematics.

Inspiration for Further Study: "The Man Who Knew Infinity" serves as an inspiration for further study of Ramanujan's life and work, encouraging readers to delve deeper into the fascinating world of mathematics.