This industry comprises establishments known as book publishers. Establishments in this industry carry out design, editing, and marketing activities necessary for producing and distributing books. These establishments may publish books in print, electronic, or audio form. Illustrative Examples: Atlas publishers (except exclusive Internet publishing) Religious book publishers (except exclusive Internet publishing) Book publishers (except exclusive Internet publishing) School textbook publishers (except exclusive Internet publishing) Encyclopedia publishers (except exclusive Internet publishing) Technical manual publishers (except exclusive Internet publishing) Map publishers (except exclusive Internet publishing) Travel guide book publishers (except exclusive Internet publishing) Cross-References.