Description: Compare early sales of Attack on Titan volumes 13, 20, 23, and 30. The decline was real, but its causes—and what monthly reading did to the Marley arc—are a more interesting question. Spoilers for the manga's later setting.
Why was volume 13 such a monster hit?
Volume 13, released in April 2014, starts to move into the political conflict around the royal government. It is not the volume containing Erwin's famous suicide charge or the complete answer to the basement mystery. Yet its estimated sales across its first four chart weeks reached about 1.58 million copies [2].
The timing matters. Season 1 of the TV anime began in April 2013 and adapted the story through the Female Titan conflict. The next season did not air until 2017 [3][4]. Millions of viewers had been introduced to a mystery that television had barely begun to answer. Buying the manga was a way to stop waiting.
The scale is visible in Oricon's first-half 2014 figures: approximately 8.34 million copies sold across the series, enough to surpass One Piece for the period [1]. Volume 13's success is better understood within that enlarged audience than as a vote on one plot arc alone.
The battle was unforgettable. The sales were still strong at Marley
Here is the same comparison point for each book: estimated copies sold by the end of its fourth chart week [2].
| Volume | Release year | Four-week sales |
|---|---|---|
| 13 | 2014 | ~1.58 million |
| 20 | 2016 | ~1.38 million |
| 23 | 2017 | ~1.32 million |
| 30 | 2019 | ~0.70 million |
| Final volume 34 | 2021 | ~1.00 million |
Around volume 20, Erwin's charge delivers a brutal, immediate objective: create an opening for Levi against the Beast Titan. Readers understand the stakes before the dust settles.
Volume 23 begins the Marley perspective, shifting the story to another country, another generation of young characters, and another version of history. Yet it still sold about 1.32 million copies within four weeks. The audience did not disappear the moment the camera crossed the sea. The steeper decline appears afterward; by volume 30 the comparable figure was roughly half that of volume 20.
A new enemy: “Do you remember what happened last month?”
Early Attack on Titan offers clear tasks: survive the Titans, recover territory, uncover the walls' secrets. Marley demands something different. Readers must track competing histories, moral claims, and characters such as Gabi and Falco while familiar protagonists recede.
In a monthly magazine, each chapter arrives after roughly a month of forgetting. The audience has to reload the character list, the political situation, and the clues. The Scouts receive ODM gear. The reader receives no device for recovering last month's subplot.
A binge read or rewatch may reduce that memory gap. Knowing the ending may also transform what an earlier line seems to mean. These are plausible explanations for a different second experience, not measured causes of the sales decline.
Did the Marley arc cause the drop?
Several things can coexist: the afterglow of an enormous anime boom fading, a long-running series losing casual buyers, changes in print and digital purchasing, and a narrative shift that asks more of the audience. The chart cannot assign percentages to those causes; it also does not capture the full digital market.
Volume 34 climbed back toward a million copies in its first four weeks. A sales line can trace purchasing behavior without grading the art. Volume 13 was not necessarily the most exciting fight; volume 23 was not an instant commercial cliff.
The real cliffhanger was a calendar
Erwin's charge hits immediately. Marley can reward a reader who remembers conversations and connects clues across many chapters. It is possible to leave during a monthly run and appreciate the same arc when reading continuously after the ending.
The cruelest Titan might have been the sentence at the bottom of the page: “To be continued next month.”
