Updated October 7, 2026. Verify changing platform requirements with the primary sources below.
What to know before you decide
- Ask for each deliverable to be listed separately rather than relying on labels such as silver, gold or premium package.
- Confirm how many formats are included: eBook, paperback and hardcover often require different files and cover specifications.
- Separate professional service fees from ISBN purchases, copyright registration, printing, advertising and other third-party costs.
- Check revision limits, source-file delivery, platform account ownership and post-publication support before comparing prices.
Primary sources
For rules, fees and platform requirements that can change, verify the current source before acting.
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