The latest volume of the reliably best-selling The Walking Dead topped the Adult Graphic Novels chart based on NPD BookScan data for March (2/26/18 – 4/1/2018) provided to ICv2, but the biggest new title was from Instagram star Mari Andrew (770,000 followers).  Her Am I There Yet?  The Loop-de-Loop, Zigzagging Journey to Adulthood HC was a close second in its first month of release.

Old media, movies to be precise, also made its presence felt on March graphic novel sales in the book channel.  Three Black Panther volumes were once again in the Top 20, and the classic Jim Starlin material in Infinity Gauntlet is back on the charts in the run-up to Avengers: Infinity War this month.

Those four volumes (three Black Panther and Infinity Gauntlet) made up Marvel’s entire presence in the Top 10, but that was still a stronger month in the Top 20 than DC Comics, which had the new Green Lantern: Earth One HC at #14.

For charts of March graphic novel sales from NPD BookScan:
March 2018 NPD BookScan – Top 20 Adult Graphic Novels
March 2018 NPD BookScan – Top 20 Kids Graphic Novels
March 2018 NPD BookScan - Top 20 Superhero, Manga, Author Graphic Novels

For the charts with the actual sales numbers from NPD BookScan, see these articles on the ICv2 Pro site:
March 2018 BookScan - Top 20 Adult Graphic Novels with Actual Sales
March 2018 NPD BookScan - Top 20 Superhero, Manga, Author Graphic Novels with Actual Numbers

NPD BookScan Top 20 Adult Graphic Novels – March 2018 (2/26/18 - 4/1/18)

Rank

Title

Author

Publisher

1

THE WALKING DEAD VOL. 29

ROBERT KIRKMAN

IMAGE COMICS

2

AM I THERE YET?: THE LOOP-DE-LOOP, ZIGZAGGING JOURNEY TO ADULTHOOD HC

MARI ANDREW

CLARKSON POTTER

3

THE LEGEND OF ZELDA: TWILIGHT PRINCESS VOL. 3

AKIRA HIMEKAWA

VIZ MEDIA

4

ONE-PUNCH MAN VOL. 13

ONE

VIZ MEDIA

5

BLACK PANTHER BOOK 1: A NATION UNDER OUR FEET

TA-NEHISI COATES

MARVEL COMICS

6

MARCH: BOOK ONE

JOHN LEWIS

TOP SHELF PRODUCTIONS

7

MY HERO ACADEMIA VOL. 11

KOHEI HORIKOSHI

VIZ MEDIA

8

SAGA VOL. 8

BRIAN K. VAUGHAN

IMAGE COMICS

9

MONSTER MUSUME VOL. 13

OKAYADO

SEVEN SEAS ENTERTAINMENT

10

TOKYO GHOUL: RE VOL. 3

SUI ISHIDA

VIZ MEDIA

11

INFINITY GAUNTLET

JIM STARLIN

MARVEL COMICS

12

BORUTO VOL. 3

MASASHI KISHIMOTO

VIZ MEDIA

13

SPLATOON VOL. 2

SANKICHI HINODEYA

VIZ MEDIA

14

GREEN LANTERN: EARTH ONE VOL. 1 HC

GABRIEL HARDMAN

DC COMICS

15

BLACK PANTHER BOOK 2: A NATION UNDER OUR FEET

TA-NEHISI COATES

MARVEL COMICS

16

RWBY

SHIROW MIWA

VIZ MEDIA

17

MY HERO ACADEMIA VOL. 1

KOHEI HORIKOSHI

VIZ MEDIA

18

DRAGON BALL SUPER VOL. 2

AKIRA TORIYAMA

VIZ MEDIA

19

CARDCAPTOR SAKURA: CLEAR CARD 2

CLAMP

KODANSHA COMICS

20

BLACK PANTHER BOOK 3: A NATION UNDER OUR FEET

TA-NEHISI COATES

MARVEL COMICS

Source: The NPD Group/BookScan

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