Comics is the No. 2 top grossing iPad app, followed by Marvel Comics at No. 3 and DC Comics at No. 4, in the books genre this week, according to research from AppData, Inside Network’s data service that tracks app and developer leaderboards.

The comiXology Comics app lets users buy and read digital comics from Marvel, DC and The Walking Dead. Al Gore’s Our Choice app continues to lead the list at No. 1 for the fourth week in a row.

To prepare for Mediabistro’s upcoming Publishing App Expo on December 7-8, we spotlight the top grossing book apps every week–helping our readers discover and analyze successful content.

Below, we’ve listed the top ten grossing iPad apps of the week–linking to App Data’s research about each individual app, including historical charts, developer information and app pricing details.

10 Top Grossing iPad Apps (Books Genre)

Tuesday September 7th

1. Our Choice Our Choice
2. Comics Comics
3. Marvel Comics Marvel Comics
4. DC Comics DC Comics
5. Bible+ Bible+
6. Nighty Night! HD Nighty Night! HD
7. The Elements: A Visual Exploration The Elements: A Visual Exploration
8. Kings and Queens by David Starkey Kings and Queens by David Starkey
9. Princess Dress-Up: My Sticker Book Princess Dress-Up: My Sticker Book
10. NIV Bible BibleReader NIV Bible BibleReader