Retired IAS officer Thomas Mathew will pen the authorised biography of Tata Sons Chairman Emeritus Ratan Tata. HarperCollins won the publishing rights for the book - 'Ratan N. Tata: The Authorized Biography' - in a reported ₹2 crore deal. "Mathew's comprehensive account of Tata's life includes unknown details and fascinating stories from his formative years," HarperCollins India said.