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PBS posting requirements state that any book which cannot be opened with a true ISBN is supposed to have it's own unique number. Members are not supposed to re-use an existing non-ISBN listing.
The posting members created these 7 listings using the Post Books Without an ISBN link on the Post Books page, entering the information manually that applies to his or her specific copy of the book.
Each "non-ISBN" item represents one copy of the book, and unless you have that exact copy that was posted using that listing by the original poster, the information (eg, book dimensions) about your copy of the book may not apply. Technically, once a non-ISBN item is received it goes onto the requestor's TBR Pile and can be reposted from there, so the listings are not totally "dead" once they are used.
From our guidelines: "about non-ISBN items on the Club Wish List if no ISBN version of the book is currently wished-for:
Last Edited on: 4/11/11 11:55 AM ET - Total times edited: 1