M 

Made-Up

 See doctored.

Managing Editor

 editor in charge of overseeing the production of the book.

Manuscript

 An author's written material prepared for publication.

Manuscript

 The book in typewritten or word processing form.

Manuscript (Ms, Mss)

 The original text of an author's work, handwritten or typed. It can also refer to a book or document written before the invention of printing.

Marbled Paper

 Colored paper with a veined, mottled, or swirling pattern, in imitation of marble, which is used with paper-covered boards and as end papers in books. The use of marbled papers was especially popular during the Victorian era.

Margin

 The space between the edge of the page and the printed text. Sometimes in binding, the margins are trimmed or cropped.

Marketing

 The business of advertising, promoting and selling books to the public and to distributors.

Marketing Plan

 A book selling plan that includes a budget, synopsis of book, target audience, distribution, promotion, timeline and how you will create demand.

Mass Market

 A small format paperback edition usually sold in airports, grocery stores and drug stores.

Media Kit

 Well-planned promotional materials, such as press releases, flyers, letters, and reviews used for announcing and circulating information about a forthcoming book.

Memoir

 a personal reflection or account.

Mid-List

 a title or author that does not become a bestseller.

Mint

 Refers to the condition of a book; it is either a brand new copy, or in the same new and unblemished condition as when it was first published. Many booksellers and collectors dislike using this term and prefer to use "as new" in describing this condition. See also bright copy.

Misbound

 An illustration, map, or a number of pages that have been incorrectly folded, bound in the wrong place, or bound in upside down.

Modern Firsts

 First editions of a book published in the 20th century.

Morocco

 Leather made from goatskin with a characteristic grain pattern. Straight-grained morocco was popular in the late 18th and early 19th centuries.

Mottled Calf

 Calf leather that has been sprinkled with copperas acid, a chemical used in tanning, giving it a mottled or spotted effect.

Mounted

 Damaged leaves, illustrations, maps, and/or photographs that have been strengthened by backing with paper or thin cloth. Also describes an illustration that has been mounted, or tipped, onto a blank page.