iBooks continues to lead as the most popular free app in the Apple App Store this week, according to Apple. iScroll, an eBook narration tool, joins the list this week.

Explore these 20 free apps and find out what kind of literary apps succeed in this crowded marketplace. As part of Mediabistro’s Publishing App Expo which happened last month, we spotlight the top grossing book apps, the top paid Android books apps and the most popular free apps every week. Follow this link to check read our coverage from the event.

Below, we’ve listed the top free iOS apps of the week–linking to iTunes so that you can check out the apps.

20 Top Free Apps (Books Genre)

Wednesday January 11th

1. iBooks

2. Kindle

3. Audible

4. Wattpad

5. Books- 23,469 classics to go

6. Nook for iPhone

7. Bible+

8. Cut the Rope Comic

9. Audiobooks

10. Love Quotes 500

11. Weird Facts 1000

12. Sex-Facts 500

13. Kobo

14. B&N Bookstore

15. Comics

16. OverDrive Media Console

17. Dirty Sex Jokes

18. Google Books

19. iScroll

20. Marvel Comics