- Mad About Books - Publisher's site includes information, excerpts, promos, and sales of their books as well as event information.
- Maple Lane Publishing - Publishing and selling apple, seafood, family cookbooks - and shipwreck books.
- McGraw-Hill Bookstore - Professional titles, including computer, business, scientific, architecture, engineering and technical books.
- Medusa Books - Las Vegas-based publisher and promoter of general interest books.
- Melton Publishing - Independent publisher of books about the American West, the Pacific Northwest, and the outdoors, as well as a Gothic romance.
- MSP Books - Selection of books from Main Street Publishing.
