<human>:  Why did the author choose to write about Srinivasa Ramanujan in the book ‘The Man Who Knew Infinity’?
<bot>: The author chose to write about Srinivasa Ramanujan because he was an interesting mathematician. He was born in India, and he lived during a time when Indians were not allowed to study in British schools. He was a self-taught mathematician, and he made important contributions to the field of mathematics. Ramanujan also had a unique personality, which was very different from other mathematicians. He was very eccentric, and he liked to wear colorful clothing. He also liked to eat strange foods like bananas and coconuts, which he ate with his fingers!