Last updated: August 16, 2026
Fact Book Studio is a software tool that lays out books. It is not a business opportunity, and buying it does not guarantee that you will sell books or earn money. Any prices, royalty figures or freelancer rates shown on our pages are illustrations of what exists in the market — they are not typical results, and they are not promises of your performance or income.
Publishing outcomes depend on factors we do not control: your niche selection, the quality and accuracy of your content, your cover and metadata, marketplace competition, advertising, seasonality and platform policy. Many self-publishers earn little or nothing. Assume your results will require real work — the tool removes the formatting step, not the business.
The Niche Vault describes market conditions observed at the date shown on each refresh. Demand and competition ratings are qualitative judgements that can be wrong and that change over time. They are a starting point for your own verification, not a forecast and not a guarantee that a niche will sell.
AI-drafted facts can be incorrect, outdated or misleading. You are the author and the publisher of record: verify everything before you publish, and complete any AI-content disclosures your marketplace requires.
Fact Book Studio is an independent product. We are not endorsed by, affiliated with or sponsored by Amazon.com, Inc., Kindle Direct Publishing, or WarriorPlus beyond using WarriorPlus as our payment marketplace. Amazon, Kindle and KDP are trademarks of Amazon.com, Inc. Our exporter checks files against KDP's published requirements, but we cannot promise how Amazon will review your content or your account.
Affiliates promoting Fact Book Studio are independent third parties. They are required to disclose their relationship and are not authorised to make income claims on our behalf; any such claim is theirs alone.
Nothing on our pages is legal, tax or financial advice. Consult a qualified professional for decisions in those areas.