112 page hardbound book, only 3 1/2 x 5" but with space for 439 entries, including plenty of room for fax numbers, cell phone numbers, and e-mail addresses. An elastic band (bound in to the back cover) keeps the book firmly closed, so its pages won't be damaged by travel in a purse, pocket, briefcase, or backpack. ISBN: 0-7649-2914-3.