"Spain in Our Hearts" by Adam Hochschild is a first edition nonfiction book published by Houghton Mifflin Harcourt Publishing Company in 2016. The book delves into the untold story of Americans who fought in the Spanish Civil War from 1936 to 1939. With 464 pages, it offers a detailed account of the historical events and social dynamics of the time, making it a valuable addition to the history and social science genres. The book also features illustrations and a dust jacket, adding to its appeal for readers interested in the subject matter.