| Retailer | File Format | DRM? | Typical Price | | :--- | :--- | :--- | :--- | | | PDF, EPUB, Kindle | Optional watermark | $31.99 | | Google Play Books | PDF + EPUB | Account-based | $29.99 | | eBooks.com | PDF | Adobe DRM | $28.79 | | VitalSource | PDF with interactive tools | Strong DRM | $34.99 |
While not a full book, sites like , GCF Global’s Design Tutorials , and YouTube’s “The Futur” channel offer free video lessons on contrast, repetition, alignment, and proximity.
