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Public Domain Validator
Publishing a classic? Ensure you meet KDP's strict "Differentiation" policies to avoid account bans.
Eligibility Checklist
Compliance Status
Incomplete
Complete the checklist to verify your book's status. Publishing ineligible content can lead to immediate account termination.
Risk Level: High
Find Safe Books?
KDP Sentinel Pro's "Treasure Hunter" scans Project Gutenberg for high-demand, abandoned books you can adopt.
Find Lost ClassicsPublic Domain Rules
What is the 'Life + 70' rule?
In most countries (including UK/EU), copyright expires 70 years after the death of the author. In the US, anything published before 1929 is generally public domain.
Can I just copy-paste from Gutenberg?
No! Amazon will block 'undifferentiated' content. You MUST add significant value—new illustrations, annotations, or a scholarly introduction—to publish it.
Asset Management
Build a Legacy Catalog.
Upgrade to KDP Sentinel Pro to manage your entire backlist's metadata in one place.
Upgrade to KDP Sentinel Pro