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Fixed-layout documents: textbooks, papers, comics, and scanned books that do not reflow like EPUB.
Articles, scans, comics, and textbooks that must keep their layout.
A 6-inch reader is the wrong screen for a two-column academic PDF.
| Formats | PDF, sometimes with OCR text layers or PDF/UA tags |
|---|---|
| DRM / license | Some academic PDFs use Adobe DRM or watermarking. Many PDFs are just files. |
| How files get in | Every major reader accepts PDF, but e-ink reflow is limited. |
| Store | Publisher sites, academic platforms, and some ebook stores |
| Libraries | Libraries often lend textbooks as PDF through Adobe or browser lockers, not Libby. |
| Refunds | Depends entirely on the seller. |
| Sync | PDF reading position sync is app-specific (Play Books, Apple Books, Kindle) and often weaker than EPUB. |
| Sharing | A personal PDF can be copied. A licensed academic PDF usually cannot. |
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PDFFormatsWhich file types open in PDFDevicesSending and sideloading books onto PDFLibrariesBorrowing library books with PDFBuyingWhere to buy books that work in PDF
Formats & Files
Which file types actually open, how conversion works, and where DRM changes the rules.
Which file types open in PDFA practical list of formats PDF will open, what gets converted on the way in, and what still fails.Converting books for PDF without breaking layoutWhen conversion is necessary for PDF, what survives, and which source formats you should leave alone.DRM and personal copies in PDFThe difference between a store license and a file you own, written for people using PDF.
Devices & Apps
Phones, tablets, e-ink readers, and the official apps — plus how to get a file onto them.
Sending and sideloading books onto PDFThe reliable ways to get a file into PDF without bouncing between three help articles.Using PDF on phones, tablets, and e-inkWhat syncs, what looks different, and which device class is the right default for PDF.Transfer mistakes to avoid with PDFThe usual ways people lose a book, duplicate a library, or send the wrong format to PDF.
Libraries & Lending
Public library apps, loan periods, holds, and what you can legally keep.
Borrowing library books with PDFCards, apps, and how a library loan shows up in PDF.Holds and loan periods for PDFHow long you wait, how long you keep the title, and what PDF does when the loan ends.What you cannot keep from library loans in PDFLoans are licenses. Here is what expires, what you may export, and what PDF will not let you archive.
Buying & Stores
Where to buy, regional locks, refunds, subscriptions, and family sharing.
Where to buy books that work in PDFOfficial stores, DRM-free shops, and which purchases will never open in PDF.Refunds and subscriptions in PDFWhat a refund window looks like, and why Kindle Unlimited, Kobo Plus, or library-like subscriptions are not ownership.Region locks and sharing in PDFWhy a storefront can refuse a sale, and who in a household can actually read the book in PDF.
Reading Setup
Fonts, spacing, dark mode, highlights, and accessibility controls that make daily reading usable.
Fonts, spacing, and themes in PDFA setup guide for PDF so long sessions do not fight the default type.Highlights and notes in PDFWhere PDF stores annotations, what you can export, and what disappears if you leave the ecosystem.Accessibility controls in PDFScreen readers, TTS, dyslexia-friendly fonts, and the limits of PDF when the file itself is poorly tagged.