Paramanu Jigyasa is a top-rated science fiction work in the Bengali language. This book was authored by two famous Bengali writers, Enakshi Chattopadhyay and Santimoy Chattopadhyay. I have collected a PDF copy of this book which is available here for free. The Orient Longman Limited initially published the hardcopy of this book in 1971. If you are eager to read this book, collect its 11 MB by clicking on the below Download PDF button.