Help center & resources
Everything you need to publish like a pro.
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Royalty calculator
Estimate your earnings by price, store mix, and volume.
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EPUB formatting guide
Specs, covers, metadata best practices for perfect ebook files.
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ISBN guide
What it is, when you need one, and how to get one free from us.
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BISAC & Thema categories
Picking the right category = more discoverability = more sales.
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AI content disclosure
New retailer requirements for AI-generated content explained clearly.
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Cover design dimensions
Per-retailer specs at a glance so your cover looks perfect everywhere.
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