est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Yanagitaka Chiho is a librarian, but he doesn't work for your local branch. He works for the Misukatonniku Library, which is rumored to contain the world's history and knowledge and will grant your wish without collecting payment. However, you must obey the contract and heed the due date. If not, Chiho will hunt you down and collect more than just a small fee. (Source: shinkeikaku)
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections
Volumes
ZERO-SUM COMICS First edition
1vols · 2008-03
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Tactics
tactics
2002 · 木下さくら, 木下さくら,東山和子, 東山和子 · 19vols
ActionFantasyMysteryHistorical
雲蒸竜変
2002 · 東山和子 · 1vols
バトル・リコレク
東山和子 · 1vols
T
Tactics公式手引之書
木下さくら, 東山和子
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Princess Comet
コメットさん
2005 · 横山光輝 · 2vols
Sci-FiComedyDramaFantasyMagical Girl
Kirihōshi
切法師
2005 · 中島論宇樹, 中島諭宇樹 · 2vols · Shōnen
ActionAdventureFantasy
Eiga Futari wa Precure Max Heart
映画 ふたりはプリキュア マックスハート
2005 · 上北ふたご, 東堂いづみ · 4vols · Shōjo
ActionComedyDramaFantasyPsychological
Hybrid Child
Hybrid child
2005 · 中村春菊 · 2vols · Shōjo
Boys' LoveSci-FiDramaFantasyRomance
Tamago no Kimi.
たまごのきみ。
2005 · 住吉文子 · 4vols
Sci-FiComedyFantasyRomance
Golden Days
ゴールデン・デイズ
2005 · 高尾滋 · 12vols · Shōjo
Boys' LoveTime TravelDramaFantasyCrossdressing