How to classify books

February 18, 2026

rygoldstein.com/posts/perils-of-isbn

Just wanted to save this little tidbit of information from an article by Ryan Goldstein on his blog (URL unavailable ATM) called “The Perils of ISBN”. Ryan wishes to have a way to track books he has read and books he might like to read.

He discusses the things that are available like GoodReads but it’s a messy interface which is easy to understand that it’s something that is run (even if not originated by) Amazon and presumably is geared towards putting you in touch with books you might like to read. Can’t blame them, Amazon does have a business to run and it’s probably why they paid ehatever they did for the site.

Then he starts to delve into other indices of books. Databases which have free form text as the key field are messy and prone to errors (should that be semicolon or a comma, do you use the whole title along with the subtitle? and other things that could be decided differently by different people providing the data. If only there was something that uniquely identified a book that was some kind of an index. It would seem that using the ISBN might be a good candidate.

Once he started to delve into this, he found that for a given … thing he might want to read … there were many different ISBNs. In the article he uses the example of “The Last Unicorn” and notes that there is a different ISBN for hardcover, paperback, audiobook, then there are also multiples for particular subsequent editions which might have a different introduction, not to mention unabridged versions. Robert Heinlein’s “Stranger in a Strange Land” was republished many years after its initial release which had included some stuff that had been removed initially, but a fan might be interested in reading, to say nothing of the opportunity to sell the book again to the folks who already had it. (see the works of Frank Zappa)

Anyway, the reason I am writing this entry is that there are some technical words in the library business that I would like to save for my own incormation, as well perhaps for yours. These are the “Functional Requirement for Bibliographic Records” or FRBR. (URL CITATION NEEDE)

The work - A distinct intellectual or artistic Creation (“The Last Unicorn”)
The Expression - the intellectual or artistic realization of the work (first edition, new forward, unabridged, entry)
The manifestation The physical embodiment of an expresssion of a work (paperback? hardcover? audiobook?)
the Item - (maybe this one has been autographed, those are potentially unique items)

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