From Wikipedia: Holt McDougal is an American publishing company, a division of Houghton Mifflin Harcourt, that specializes in textbooks for use in secondary schools. Holt, Rinehart & Winston was a division of Harcourt Education. When owner Reed Elsevier sold Harcourt to Houghton Mifflin in 2007, Holt, Rinehart and Winston was combined with McDougal Littell to form Holt McDougal. ~~~ Holt McDougal publishes textbooks on mathematics, language arts, social studies, science, health, and world language (French, Spanish, and German). They have also published children's books for the Weekly Reader Book Club, including Sweet Pickles, Fraggle Rock, and Snoopy. ~~~ Houghton Mifflin Harcourt (/?ho?tn ?m?fl?n/) is an educational and trade publisher in the United States. Headquartered in Boston's Back Bay, it publishes textbooks, instructional technology materials, assessments, reference works, and fiction and non-fiction for both young readers and adults. ~~~ The company was formerly known as Houghton Mifflin Company but changed its name following the 2007 acquisition of Harcourt Publishing. Prior to March 2010, it was a subsidiary of Education Media and Publishing Group Limited, an Irish-owned holding company registered in the Cayman Islands and formerly known as Riverdeep. ~~~ In 1961, Houghton Mifflin famously passed on Julia Child's Mastering the Art of French Cooking, giving it up to Alfred A. Knopf who later published it in 1962. It went on to become an overnight success and is considered by many to be the bible of French cooking. Houghton Mifflin's strategic error was depicted in the 2009 film Julie & Julia. ~~~ In 1967, Houghton Mifflin became a publicly traded company on the New York Stock Exchange under the stock symbol HTN. The company is currently privately held and no longer trades under this symbol. ~~~ During the 1990s, Houghton Mifflin acquired both McDougal Littell, an educational publisher of secondary school materials, and D.C. Heath and Company...