Comparing offline ebook access formats

Our free ebooks come in several formats. Use this table to understand which features are available depending on the format you choose.

 

Check what ebook is available in what formats.

Web Epub App Screen PDF Print
Devices Any web browser Any epub reader (Apple iBooks, Thorium Reader).

Support for many features will depend on the technical sophistication of your ereader software.

Not compatible with Amazon Kindle.

Android, Windows Any PDF reader Available to order from most online retailers
Clickable links Yes Yes. External links  launch web browser. Yes. External links  launch web browser. Yes. External links  launch web browser. External links are displayed as short URLs.
Multiple-choice questions Yes, with automatic self-marking and feedback. Some epub readers (e.g. Apple iBooks) support self-marking with feedback. Yes, with automatic self-marking and feedback. MCQs are visible with no self-marking or feedback. MCQs are visible with no self-marking or feedback.
Slidelines Yes. Click, tab or arrow keys to move through figures. All images shown with captions, including a summary slide. Yes. Click, tab or arrow keys to move through figures. A single summary image with each slide’s text. numbered below. A single summary image with each slide’s text.
Video Yes. Streams in place from YouTube. Click the thumbnail image or description to launch YouTube in a web browser. Yes. Streams in place from YouTube, if your device is online. Click the image or short URL to launch YouTube in a web browser. Link to YouTube displayed as a short URL.
Definitions Popups on bold, blue words. Popups on bold, blue words in some epub readers (e.g. Apple iBooks). Other readers will show definitions in a box beside the first instance of the term in each unit. Popups on bold, blue words. In the sidebar, beside the first instance of the term in each unit. In the sidebar, beside the first instance of the term in each unit.
Footnotes Click footnote number for a popup. Also visible at end of unit. Click footnote number to jump to the footnote at the end of the unit, where there is a link back to the text. (Some ereaders also provide a ‘Back’ button.) Click footnote number for a popup. Also visible at end of unit. Footnote numbers in text, with footnotes at end of unit. Footnote numbers in text, with footnotes at end of unit.
Full-screen button on images Click button to display image fullscreen. Not available Click button to display image fullscreen. NA NA
Interactive OWID graphs Click button to launch OWID interactive in place. Click the link to open the interactive graph on the OWiD site in a web browser. Click button to launch OWID interactive in place, if your device is online. Not currently supported in the Windows app, where button launches interactive in a web browser. Click short URL in sidebar to open interactive on the OWID site. Use the short URL in the sidebar to open interactive on the OWID site.
Languages Switch instantly between multiple languages. One epub per  language. One app per language. Most languages available as a screen PDF. Some languages available in print editions.
Dark mode Switch between modes from Contents dropdown. Provided automatically by some ereader apps; not built into the ebook itself. Switch between modes from Contents dropdown. NA NA
Theme filters Click the ≡ filter button beside themes on chapter pages to show only relevant content. Not available Click the ≡ filter button beside themes on chapter pages to show only relevant content. NA NA
Deep links to headings Click the ‘Link’ button on a heading to get that heading’s URL in the address bar. NA NA NA NA
Expandable boxes

(Only used in some books, e.g. Walkthrough boxes in Doing Economics)

Click + to expand. Boxes are always open and visible. Click + to expand. NA NA
Index

(Back-of-the-book topic list. Available in some books, e.g. The Economy)

Topics accessible by clicking numbered links. Topics accessible by clicking numbered links. Topics accessible by clicking numbered links. Topics listed with clickable page numbers. Topics listed with page numbers.
Bookmarking Click or drag on text to create a bookmark. Supported automatically by some ereader apps, not built into ebook. Click or drag on text to create a bookmark. Supported automatically by some PDF apps, not built into ebook. Your nearest physical bookmark.
Bookmark notes Coming soon. Supported automatically by some ereader apps, not built into ebook. Not yet available. Supported automatically by some PDF apps, not built into ebook. NA