A book sent to reviewers, wholesale customers, and the media. Usually they are in wraps and inexpensive bindings. Used to get quotes for publicity and leads for advance sales. The precede the printed copies that are sold to the public.
A book supplied before publication to a reviewer or bookseller. The binding may be different from that of the first edition.
Also known as a review copy, since they are sent to reviewers as complimentary, advance copies. Advance copies are more often than not paper bound books, and often with the publisher's review slip laid in.