Tight, clean, flat, square and sharp books. Chip from the corner. Pages are perforated at the left margin for removal as homework or classroom hand-in. Some toning. No answers in either the text book or the achievement test book. McCormick-Mathers was acquired by American Book Co [McGuffey Readers] in 1961. After a series of mergers and acquisitions, the imprint disappeared and the intellectual property became that of DC Heath, which was then absorbed by Houghton Mifflin, now Houghton-Mifflin Harcourt. College level properties merged through Thomson into Van-Nostrand and now Cengage.