We are trying to mark up the book page on our site so that they can map the page to the Open Graph and Clearly identified as one of the essential items for book pages markup is the International Standard Book Number or ISBN #.
However, many books (especially e-books) do not have an IBN number and rejects Facebook's identity for books that the item as a book if there is no ISBN number in any book , What would you provide for this tag?
This is a known Facebook issue:
As an alternative solution, It looks like you have the old open graph type book
& lt; Meta property = "and: type" content = "book" & gt; & Lt; Meta Property = "and: Image" content = "http://ecx.images-amazon.com/images/i/5126Ebreck.jpg" & gt; & Lt; Meta Property = "OG: Title" content = "Frankie in Paris" & gt; & Lt; Meta Property = "Book: Release_Date" content = "2012-12-17 00:00:00 UTC" & gt; Instead of the new books.book open graph type
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