Sublime

On the digital side, for the last three or four years at least, Amazon’s e-book sales growth has been almost entirely driven by lower-cost titles from self-published ‘indie’ authors, digital-first presses, and Amazon’s own in-house publishing imprints. The more established publishers have seen very little of that e-book growth; the industry’s large

Smashwords,

What does the nontraditional publishing world look like beyond Amazon? Although Amazon dominates this market, some choose to publish through channels beyond Amazon because Amazon doesn’t reach other bookstores much at all, doesn’t reach other e-book formats, and really hardly scratches the surface on libraries with print books.

sales (in approximate order of impact): Record an audiobook — 20-30% boost to sales, 5-10% boost to royalties Submit the book to more platforms (iBooks, Google Play, etc., or distribute to all of them at once via a tool like IngramSpark or Draft2Digital) — 5-15% boost in total across all non-Amazon