Formats
Downloads
The same source rendered for the browser, ebook readers, and print.
Standard EPUB
Standard ebook edition
For ebook readers and reading apps. Contains the core 180-day lesson sequence without the optional research appendices.
Standard PDF
Standard print edition
A fixed-layout, print-friendly copy of the core lessons, tuned for paging, citations, and offline reading.
Deep Dive EPUB
Deep-dive ebook edition
The ebook reader version with each day's optional appendix included for fuller context, extra examples, and source notes.
Deep Dive PDF
Deep-dive print edition
The complete print-ready edition with deep-dive appendices included, best for offline study, annotation, or reference.