See D. R. Regni, Medieval Nepal (4 vol., 1965–66); N. B. Thapa and D. P. Thapa, Geography of Nepal (enl. and rev. ed. 1969); I. R. Aryal and T. P. Dhungyal, A New History of Nepal (1970); R. S. Chauhan, The Political Development in Nepal, 1950–70 (1972) and Society and State Building in Nepal (1988); J. Whelpton, Nepal (1990); B. Crossette, So Close to Heaven: The Vanishing Buddhist Kingdoms of the Himalayas (1995); S. B. Ortner, Life and Death on Mt. Everest (1999); J. Gregson, Massacre at the Palace: The Doomed Royal Dynasty of Nepal (2002).