Top Ten Best-Selling Ebooks -- Week of August 16

All it takes is a quick glance at the Digital Book World Ebook Best-Seller List on any given week to see how a TV or movie adaptation boosts best-selling ebook sales.

But once in a while the effect is especially pronounced.

If I Stay ended a 12-week run for The Fault in Our Stars when the Gayle Forman novel nudged John Green's aside a few weeks ago to take the No. 1 spot. The success of both titles tracks the big movie releases based on them.

Diana Gabaldon's Outlander is now in the No. 2 position, thanks in large part to the Starz series adaptation that debuted last week, suggesting TV now has as much clout as film to power popular ebooks up the list.

The top 10 best-selling ebooks for the week of August 16:

1. If I Stay by Gayle Forman (Penguin Random House) -- $4.99

2. Outlander: A Novel by Diana Gabaldon (Penguin Random House) -- $4.99

3. Big Little Lies by Liane Moriarty (Penguin Random House) -- $10.99

4. The Fault in Our Stars by John Green (Penguin Random House) -- $4.99

5. The Goldfinch: A Novel (Pulitzer Prize for Fiction) by Donna Tartt (Hachette) -- $6.99

6. Divergent by Veronica Roth (HarperCollins) -- $4.99

7. Not a Drill: A Jack Reacher Short Story (Kindle Single) by Lee Child (Penguin Random House) -- 1.99

8. Gone Girl: A Novel by Gillian Flynn (Penguin Random House) -- $8.52

9. Where She Went (If I Stay Book 2) by Gayle Forman (Penguin Random House) -- $4.99

10. Insurgent (Divergent Book 2) by Veronica Roth (HarperCollins) -- $6.99