what is photo book?

A photo-book or photobook is a book in which photographs make a significant contribution to the overall content. The most critically acclaimed photo-books celebrate the creative work of an individual photographer, but can also result from the collaboration between a photographer and a writer, an editor, a publisher or a designer.


from Wikipedia

WHAT ARE PHOTO BOOKS?

Photo books are a very attractive way to present a collection of digital photographs. Instead of a photo album, where photos are glued or inserted into pockets, photos in a photo book are printed onto the pages. The final result looks just like a book that you would buy in a bookstore. The paper is of very high quality and the book is professionally bound by gluing, sewing or stapling with a soft,  hard or even leather cover. You can make a photo book in a variety of sizes, from a small ‘brag book’ to large, lay-flat coffee table books. - http://www.kenrockwell.com/tech/books.htm