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For Collectorz.com Core, a CLZ Account is required.
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Welcome to Collectorz.com Core for Books
Core for Books is the new way to submit data to the Collectorz.com central online book database. It replaces the old "Submit to Collectorz.com" feature that was available in older versions of Book Collector. Core also lets you easily report missing books or errors in existing book database entries.
Use the new Core command in Book Collector 8 to submit data or report errors.
Alternatively, click the button below to search our database by ISBN, then submit your changes from there.