The Levi Studios Library — the Linux books are free forever, and the storybooks are 99¢. Pick a book up off the shelf and turn its pages with your thumb.
Every Linux Is Not Scary book on this shelf is FREE FOREVER — the reader's free too. The storybooks are 99¢ each via Cash App, sample preview first. Grab a page, drag it across — it bends under your finger, swishes, and ticks when it lands. Every book also reads itself aloud, and the pages turn with the story.
The Linux series runs front to back in tiers: Basic (Book One) · Advanced (Book Two) · Super Advanced (to come) — now at Revision 2.