A new Jet City edition of a graphic novel originally published by Marvel hit the chart of the "Top 20 Adult Graphic Novels" sold in the bookstore channel in January, provided exclusively to ICv2.com by Nielsen BookScan.  This is an initial answer to the question of whether Amazon will be able to effectively use its marketing prowess to sell the graphic novels it publishes, and that answer appears to be "yes."

The Sworn Sword: The Graphic Novel (A Game of Thrones) is material originally packaged by the Dabel Brothers and published by Marvel back in 2008.  But that, of course, was before the premiere of the HBO series based on Game of Thrones, which elevated author George R.R. Martin’s universe to high geek status.

Amazon’s Jet City imprint (see "Amazon Enters Comic Book Publishing") has cleverly incorporated Game of Thrones into the title of the book, and has been rewarded with the #15 title in January for five year old material.  Jet City does promise over 25 pages of bonus material, and the book appears to be sporting a new cover.  And Amazon has a discount of over 40% from the $14.95 cover price, which makes the 176-page graphic novel only $8.55, a good price.  The material is clearly in demand, with the Marvel hardcover edition going for $84 to $172 from ten Amazon resellers.

There's been a lot of discussion about Amazon entering the comic market as a publisher (see "Amazon and Comics: How Close Is the Apocalypse?"); it's now starting to play out in real time.

Manga had a good month in January, with eight manga titles in the Top 20.  The mighty Naruto led the way, with the #1 title and two in the Top 20.  The surging Attack on Titan, though, had four in the Top 20, including the #2 and #3 volumes.

The Walking Dead slowed down in January, in the period between the two halves of the television series, to a mere four volumes in the Top 20, down from eight in December.

BookScan Top 20 Graphic Novels in January 2014
Rank	Title	Author	Publisher
1	NARUTO VOL. 64	MASASHI KISHIMOTO	VIZ MEDIA
2	ATTACK ON TITAN VOL. 10	HAJIME ISAYAMA	KODANSHA COMICS
3	ATTACK ON TITAN VOL. 1	HAJIME ISAYAMA	KODANSHA COMICS
4	THE WALKING DEAD VOL. 19	ROBERT KIRKMAN	IMAGE COMICS
5	THE WALKING DEAD COMPENDIUM VOL. 1	ROBERT KIRKMAN	IMAGE COMICS
6	THE WALKING DEAD COMPENDIUM VOL. 2	ROBERT KIRKMAN	IMAGE COMICS
7	BATMAN VOL.3: DEATH OF THE FAMILY HC	SCOTT SNYDER	DC COMICS
8	ATTACK ON TITAN VOL. 2	HAJIME ISAYAMA	KODANSHA COMICS
9	MONSTER MUSUME VOL. 2	OKAYADO	SEVEN SEAS
10	NARUTO VOL. 63	MASASHI KISHIMOTO	VIZ MEDIA
11	SAGA VOL. 1	BRIAN K VAUGHAN	IMAGE COMICS
12	FUN HOME: A FAMILY TRAGICOMIC	ALISON BECHDEL	MARINER BOOKS
13	YU-GI-OH! ZEXAL VOL. 4	SHIN YOSHIDA	VIZ MEDIA
14	BATMAN VOL 2: THE CITY OF OWLS	SCOTT SNYDER	DC COMICS
15	MISS PERENGRINE'S HOME FOR PECULIAR CHILDREN HC	RANSOM RIGGS	YEN PRESS
16	THE SWORN SWORD: THE GRAPHIC NOVEL (A GAME OF THRONES)	GEORGE R.R. MARTIN	JET CITY COMICS
17	WATCHMEN	ALAN MOORE	DC COMICS
18	THE WALKING DEAD VOL. 1	ROBERT KIRKMAN	IMAGE COMICS
19	ATTACK ON TITAN VOL. 3	HAJIME ISAYAMA	KODANSHA COMICS
20	BATMAN: THE KILLING JOKE DLX ED HC	ALAN MOORE	DC COMICS

For past BookScan Top 20 Graphic Novel lists, see the "BookScan Top 20 GNs Index."