Who wrote the book "India's Lost Frontier the Story of the North-West Frontier Province of Pakistan"?

The book, "India's Lost Frontier the Story of the North-West Frontier Province of Pakistan", has been penned by veteran civil servant Raghvendra Singh. He was the Director-General of the National Archives of India. This book on the history of Pakistan's Khyber Pakhtunkhwa, earlier known as the North-West Frontier Province (NWFP). This book presents the chronicles of Congress leadership in 1947 surrendered India's claim on the "tactically important" province despite the resistance of Mahatma Gandhi and some influential political leaders of the region.