The Unpleasant Profession of Jonathan Hoag is a collection of science fantasy short stories by American writer Robert A. Heinlein. Published by The Gnome Press in (1959), the collection was also published in paperback under the title 6 × H.
Chalker, Jack L.; Mark Owings (1998). The Science-Fantasy Publishers: A Bibliographic History, 1923–1998. Westminster, MD and Baltimore: Mirage Press, Ltd. p. 308.