Publishers: M
- Marian Wood [Henry Holt and Company] (1)
- Mariner (Houghton Mifflin) (1)
- Mariner Books (1)
- Mariner Books [Houghton Mifflin] (3)
- Marlboro Press (1)
- Marlowe & Company (3)
- Mary Long (1)
- McClelland & Stewart (2)
- McGraw Hill Book Company (1)
- McGraw-Hill (1)
- McGraw-Hill Book Company, Inc. (3)
- McGraw-Hill Paperback (1)
- Mentor [New American Library] (1)
- Miami University Press (1)
- Middlebury College Press (1)
- Milkweed Editions (3)
- Minerva (1)
- Mira Press (1)
- MIT Press (6)
- Modern Library (3)
- Moon Publications (1)
- Morton (1)
- Moyer Bell (1)
- Mulch Press (1)