Narwhal and Jelly, a graphic novel series by Ben Clayton, hit the Top 20 Kids Graphic Novels in the book channel with two volumes in March, according to data provided by NPD BookScan covering the period February 26 to April 1, 2018.  The first volume, Unicorn of the Sea, was released in 2016 and won an Eisner Award for Best Publication for Early Readers (up to age 8).  Now two volumes have been released in quick succession over the past two months, and both are in the Top 20 for March.

The latest Big Nate volume was the only other March release in the Top 20, and only one other 2018 release, The Dragonet Prophecy, made the chart.  Demonstrating high quality legs (and low new release counts for Q1), the rest of the titles were all long-running repeats.

For charts of March graphic novel sales from NPD BookScan:
March 2018 NPD BookScan – Top 20 Adult Graphic Novels

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

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

Rank

Title

Author

Publisher

1

DOG MAN: A TALE OF TWO KITTIES HC

DAV PILKEY

GRAPHIX

2

DOG MAN UNLEASHED HC

DAV PILKEY

GRAPHIX

3

DOG MAN HC

DAV PILKEY

GRAPHIX

4

DRAMA

RAINA TELGEMEIER

GRAPHIX

5

A WRINKLE IN TIME: THE GRAPHIC

MADELEINE L'ENGLE

SQUARE FISH

6

SMILE

RAINA TELGEMEIER

GRAPHIX

7

BIG NATE: SILENT BUT DEADLY

LINCOLN PEIRCE

ANDREWS MCMEEL

8

THE LAST KIDS ON EARTH AND THE ZOMBIE PARADE HC

MAX BRALLIER

VIKING BOOKS

9

SISTERS

RAINA TELGEMEIER

GRAPHIX

10

THE BABY-SITTERS CLUB VOL. 5

RAINA TELGEMEIER

GRAPHIX

11

GHOSTS

RAINA TELGEMEIER

GRAPHIX

12

THE DRAGONET PROPHECY

TUI SUTHERLAND

GRAPHIX

13

THE BABY-SITTERS CLUB VOL. 1

RAINA TELGEMEIER

GRAPHIX

14

REAL FRIENDS

SHANNON HALE

FIRST SECOND

15

INVISIBLE EMMIE

TERRI LIBENSON

BALZER & BRAY

16

THE LAST KIDS ON EARTH AND THE ZOMBIE PARADE HC

MAX BRALLIER

VIKING BOOKS

17

BIG NATE: A GOOD OLD-FASHIONED WEDGIE

LINCOLN PEIRCE

ANDREWS MCMEEL

18

A NARWHAL AND JELLY BOOK #3

BEN CLANTON

TUNDRA BOOKS

19

A NARWHAL AND JELLY BOOK #2

BEN CLANTON

TUNDRA BOOKS

20

THE BABY-SITTERS CLUB VOL. 2

RAINA TELGEMEIER

GRAPHIX

Source: The NPD Group/BookScan

NPD BookScan collects weekly point-of-sale data on print books from over 16,000 locations including e-tailers, chains, mass merchandisers, independent bookstores, and more.  NPD BookScan covers approximately 85% of the U.S. trade print book market.  The ranks on this chart are based on piece sales. Some publishers classify titles that are primarily text, or art books, as graphic novels; we've removed those titles from the ranking above.

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