Ian Fletcher (born 1957) is the author of works on the Napoleonic wars.
Ian Fletcher (1920-1988) is the author of works on poetry and literature.
Ian Frank Fletcher (born 1944 in Wakefield, Yorks) is the author of works on law. He is a Professor of International Commercial Law at University College, London(see "Ian F. Fletcher").
Ian M Fletcher, b.1948, is another UK lawyer who wrote the book on Receivership
Ian H Fletcher is a US Economist who wrote about the faults of Free Trade.