You’ll need different files depending on your format:
For print books:
- A print-ready PDF of your interior (formatted to trim size with correct margins and bleed)
- A print-ready PDF of your full cover (front, spine, back) with barcode space
For ebooks:
- A reflowable EPUB file (for Kindle and others)
- A high-resolution cover image (usually JPEG or PNG, front only)
Make sure your files meet the technical specs of each platform you use.