Help & FAQs

Find a book

Use the search box to look up a title, author, or subject. Search with the most distinctive words you know; you can also browse the subject categories, author pages, series pages, or the popular titles list.

Use a book page

Open a title to review the information available for that book and see whether a PDF option is currently provided. Details and availability can vary between listings.

Download a PDF

1. Open the book's page and review the title and available details.
2. Check the page for a PDF download option. Not every listing has one.
3. If the site shows a countdown, let it finish and use the download control presented on that page.
4. If a temporary download link expires, return to the book page and request a fresh one.

If a file does not open in your browser, save it and open it with a PDF reader on your device.

Creative Commons licenses

Book files are sourced from different online sites under Creative Commons licenses. The exact license may differ by work. Check the license and source details for the particular file before reusing it: all six main CC licenses require attribution, and some also restrict commercial use or adaptations, or require adaptations to use the same terms. The Creative Commons license guide explains these conditions.

Something is missing or not working?

For a catalog correction, missing source or license detail, or a download issue, email [email protected]. Include the book title, exact page URL, and a short description of the issue. Please do not send passwords, payment details, or unrelated sensitive information.