Sergeev E. Russian Military Intelligence. — In: J. Steinberg, et al. (eds) The Russo-Japanese War in Global Perspective: World War Zero, Leiden-Boston: Brill, 2005. Vol. 1. P. 281–304.
Sergeev E. Russian Military Intelligence in the War with Japan, 1904-05. Secret Operations on Land and at Sea. London — New York, Routledge, 2007.
Sharma A. India's Foreign Problem and Lord Curzon (1899–1905) // Journal of Historical Research. 1969. № 12(1). P. 81–92.
Sharma A. The Russian Menace to India and Lord Curzon (1899–1905) // Proceedings of Indian History Congress. 1969. №. 31. P. 476–181.
Shaumian I. Tibet. The Great Game and Tsarist Russia. New Delhi: Oxford University Press, 2000.
Siegel J. Endgame: Britain, Russia and the Final Struggle for Central Asia, 1907–1914. London-New York: I.B. Tauris Publishers, 2002.
Sinclair A. The Other Victoria. The Princess Royal and the Great Game of Europe. London: Weidenfeld and Nicolson, 1981.
Skrine C., Nightingale P. Macartney at Kashgar. New Light on British, Chinese and Russian Activities in Sinkiang, 1890–1918. London: Methuen, 1979.
Snelling J. Buddhism in Russia. The Story of Agvan Dorzhiev, Lhasa's Emissary to the Tsar. Longmead, Shaftsbury: Dorset, 1993.
Soothill W. China and the West. A Sketch of Their Intercourses. London: Curzon Press; Totowa, N. J.: Rowman and Littlefield, 1974.
Spence J. The Chan's Great Continent: China in Western Minds. New York-London: W.W. Norton and Co., 1998.
Steele E. Salisbury at the India Office. — In: R. Blake, H. Cecil (eds) Salisbury. The Man and His Policies. New York: St Martin's Press, 1987. P. 116–147.
Steele E. Lord Salisbury: A Political Biography. London: University College of London Press, 1999.
Steiner Z., Neilson K. Britain and the Origins of the First World War. Basingstoke: Palgrave, Macmillan 2003.
Stewart J. Spying for the Raj. The Pundits and the Mapping of the Himalaya. Phoenix Mill: Sutton Publishing, 2006.
Storry R. Japan and the Decline of the West in Asia, 1894–1943, London and Basingstoke: Macmillan, 1979.
Strebelsky I. The Frontier in Central Asia. — In: J. Bates, R. French (eds) Studies in Russian Historical Geography. London: Academic Press, 1983. Vol. 1. P. 143–173.
Strong J. The Ignatiev Mission to Khiva and Bokhara in 1858 // Canadian Slavonic Papers. 1975. Vol. XVII. № 2–3. P. 236–269.
Sukash С. Afghanistan and the Great Game. Delhi: New Century Publications, 2002.
Sumner В. Tsardom and Imperialism in the Far East and Middle East, 1880–1914. London: Humphrey Milford Amen House, 1940.