I have been collecting photobooks for about forty years. I love the way they feel and the intimate viewing distance looking at one. The photographs presented in a book is so much different than when viewing one on a wall in a gallery or museum. How the photographs are sequenced provide a very different "narrative" than any one photograph by itself. This essay by Teju Cole, "In Praise of the Photobook" sums up many of the reasons why a photobook is unique.