John Kenneth "Ken" Galbraith, OC ( , October 15, 1908 – April 29, 2006) was a Canadian-born economist, public official, and diplomat, and a leading proponent of 20th-century American liberalism.
 His books on economic topics were bestsellers from the 1950s through the 2000s, during which time Galbraith fulfilled the role of public intellectual.
 As an economist, he leaned toward Post-Keynesian economics from an institutionalist perspective.
Economics and the Public Purpose is a 1973 book by Harvard economist John Kenneth Galbraith.
 Galbraith advocates a "new socialism" as the solution, nationalising military production and public services such as health care.
 He also advocates introducing disciplined wage, salary, profit and price controls on the economy to reduce inequality and restrain the power of giant corporations. Socialisation of the "unduly weak industries and unduly strong ones" together with planning for the remainder would allow the public interest to be accorded its rightful preference, argues Galbraith, over private interests.
 He adds that this can only be achieved when there is a new belief system that rejects the orthodoxy of economics in the past.
 The new socialism needs to be achieved through gradual democratic political change.
The PEN/John Kenneth Galbraith Award for nonfiction is awarded by the PEN American Center biennially "to a distinguished book of general nonfiction possessing notable literary merit and critical perspective and illuminating important contemporary issues which has been published in the United States during the previous two calendar years.
 It is intended that the winning book possess the qualities of intellectual rigor, perspicuity of expression, and stylistic elegance conspicuous in the writings of author and economist John Kenneth Galbraith, whose four dozen books and countless other publications continue to provide an important and incisive commentary on the American social, intellectual and political scene."
The Affluent Society is a 1958 (4th edition revised 1984) book by Harvard economist John Kenneth Galbraith.
 The book sought to clearly outline the manner in which the post-World War II United States was becoming wealthy in the private sector but remained poor in the public sector, lacking social and physical infrastructure, and perpetuating income disparities.
 The book sparked much public discussion at the time.
 It is also credited with popularizing the term "conventional wisdom."
 Many of the ideas presented were later expanded and refined in Galbraith's 1967 book, "The New Industrial State".
American Capitalism - The Concept of Countervailing Power is a book by John Kenneth Galbraith, written in 1952.
 It contains a critique of the view that markets, left to their own devices, will provide socially optimal solutions.
 Galbraith agrees with F. A. Hayek as far as the assertion goes that "the price system will fulfil [its] function only if competition prevails, that is, if the individual producer has to adapt to price changes and cannot control them."
 The book presents Galbraith's account of the inter-relationship between politics and economics which for Galbraith is based on a theory of competition guiding a capitalistic democratic society.
The Great Crash, 1929 is a book written by John Kenneth Galbraith and published in 1955; it is an economic history of the lead-up to the Wall Street Crash of 1929.
 The book argues that the 1929 stock market crash was precipitated by rampant speculation in the stock market, that the common denominator of all speculative episodes is the belief of participants that they can become rich without work and that the tendency towards recurrent speculative orgy serves no useful purpose, but rather is deeply damaging to an economy.
 It was Galbraith's belief that a good knowledge of what happened in 1929 was the best safeguard against its recurrence.
The Nature of Mass Poverty is an economics book by John Kenneth Galbraith published in 1979, in which Galbraith draws on his experiences as ambassador to India to explain the causes for and solutions to poverty.
 He begins by differentiating so-called "case poverty" of individuals (as detailed years earlier in "The Affluent Society") from "mass poverty", largely observed in rural areas of the developing world.
Catherine Galbraith (née Catherine Merriam Atwater; January 19, 1913 – October 1, 2008) was an American author who was the wife of economist and author John Kenneth Galbraith, and the mother of four sons: diplomat and political analyst, Peter W. Galbraith, economist James K. Galbraith, attorney J. Alan Galbraith, and Douglas Galbraith who died in childhood of leukemia.
Harry Norman Turtledove (born June 14, 1949) is an American novelist, best known for his work in the genres of alternate history, historical fiction, fantasy, and science fiction.
The New Industrial State is a 1967 book by John Kenneth Galbraith.
 A second and revised edition appeared in 1972.
 In it, Galbraith asserts that within the industrial sectors of modern capitalist societies, the traditional mechanism of supply and demand is supplanted by the planning of large corporations, using techniques such as advertising and, where necessary, vertical integration.

Question: Were both Harry Turtledove and John Kenneth Galbraith both writers?
Answer: yes