(editor)Houghton Mifflin Harcourt Publishing Company (editor)Houghton Mifflin Harcourt Publishing Company, Houghton Mifflin Harcourt Publishing Company Houghton Mifflin Harcourt Publishing Company, Houghton Mifflin Books for Children is an imprint of Houghton Mifflin Harcourt Publishing Company Houghton Mifflin Harcourt Publishing Companyeditor Houghton Mifflin Harcourt Publishing Companyceditor