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- Multiple identifiers are tested: OCLC, ISBN, LCCN, in that order.
- How to troubleshoot an incorrect Google Books cover thumbnail (Ex Libris Knowledge Base article)
- Local troubleshooting. There will be slight variations depending on what browser you are using.
- If you hover over a book cover image and right click and choose "Inspect Element," the developer bar in your browser will show the source link of the image. This is how you can tell if it came from Google.
- To find out which identifiers we sent to Google when checking to see if they had a book cover, first search by MMS ID to make sure the record in question is the ONLY search result.
- Next, open the Developer bar if not already open. (You can just inspect element again to open the bar).
- Switch to the Network tab of the developer bar, and clear existing lines by using the trash icon
- Refresh the page
- Use the gear icon or search box to filter the URL list by typing "google" to see just google traffic.
- Depending on your browser, you will see a line for either "bibkeys" or "books"
- Click on the headers tab to see the identifiers that Harvard sent Google, e.g. :
- Click on the preview tab to see what Google sent back to Harvard for each identifier:
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- The "thumbnail_url" is the link to the cover image
- The other URLs will go to pages in Google Book Search, where you may see additional information to help with troubleshooting
- If you hover over a book cover image and right click and choose "Inspect Element," the developer bar in your browser will show the source link of the image. This is how you can tell if it came from Google.
Syndetics
- Only ISBNs are used for cover identification
- How to report an error in a Syndetics book cover (Ex Libris Knowledge Base article)
You can verify precisely which parameters are sent to a provider by inspecting the Network traffic in the browser's developer tools. When doing so, make sure you search by unique identifier such that you get only a single search result, otherwise your Network traffic will show image requests for all records on the search result page.
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- The troubleshooting steps listed above should work for Syndetics troubleshooting as well. Use 'syndetics' instead of 'google" when filtering the list of URLs in the Network tab.
Journals via Browzine
For any journals that are supported by Browzine, we use the cover images from Browzine, which are based on an ISSN match.
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