Besides his novels, Reid authored travel books, such as 'An Amateur in Africa' (1925), and historical works like 'Commerce and Conquest: The Story of the Honourable East India Company.' He also delivered lectures on his travels, enriching them with personal film footage. In his later years, he pursued interests in big-game shooting, hunting, swimming, and tennis. Even in his mid-sixties, upon returning to England, Reid continued engaging in swimming and tennis. He passed away on November 29, 1954, at Townlands Hospital in Henley, Oxfordshire.