One-Punch Man: Hero Encyclopedia

One-Punch Man: Hero Encyclopedia (ワンパンマンヒーロー大全, Wanpanmanhīrō Taizen) is the first encyclopedia that went on sale on October 3, 2015.

Content
The first encyclopedia contains information's about the heroes (their up to date ranks and data level), villains, monsters, battles and the general world of One-Punch Man. It also comes with a making of and interview with ONE and Murata, a quiz, a popularity poll for the techniques and scenes, and a fisherman extra chapter.

The length of time for a battle is provided as well.

Continuity

 * Armored Chief Clerk is revealed to be a businessman who quit his job to become a hero.