How long are the books?
Whether you're looking for a quick read or an in-depth guide, you can choose from four book lengths:
- Comprehensive (250-300 pages)
- Detailed (150-200 pages)
- Essential (70-100 pages)
- Short (30-50 pages)
These ranges are measured against the Download PDF for Tablet or Computer file, a fixed page layout sized like a physical book (6" × 8"). Your book also comes in two other formats, each with its own page count for the same content. The online reader paginates live to fit your current browser window, so a wide desktop screen fits more text per page and shows a lower count. Download PDF for Phone uses a smaller page, so it shows a higher count.
To see the actual number of pages in your book, open ⋮ → Download PDF for Tablet or Computer from the book's menu.
The final page count can also vary with the subject itself. A "Detailed" book might land at 150 pages for one topic and 300 for another, depending on how much content the subject genuinely needs, and on the occasional book that runs meaningfully longer or shorter than its band. Treat the ranges as targets, not guarantees.
Each book is written once at the length you select. We can't regenerate an existing book at a different length, so pick the length that fits before you buy.