Stubborn Bull Book

Black Clover: Stubborn Bull Book (ブラッククローバー 暴牛の書) is the first light novel of Black Clover.

The novel introduces Fanzell Kruger, Dominante Code, and Mariella, who later appeared in the manga and anime.

Summary

 * 1) Boy's Challenge (少年の挑戦): Asta encounters Fanzell Kruger in the woods near Hage. Fanzell teaches the boy the basics of swordsmanship, and Asta defends his teacher from a group of Diamond Kingdom mages, including Mariella, a former student of Fanzell.
 * 2) Black Market Bruce (ブラックマーケット・ブルース): Noelle Silva trains with a special brooch that she bought from Dominante Code. This brooch has a perverted magical lifeform named Bruce who helps Noelle control her magic. When the Black Bulls are called to help save a town from a wildfire, Noelle and Bruce work together to extinguish the flames, but in the process, Bruce exhausts the magic power keeping him alive.
 * 3) Your Dream Will Come True (君の夢が叶うのは): Yami Sukehiro and Magna Swing fill in for Fuegoleon and Leopold Vermillion as guest lecturers at a magic school. They discover that the teacher, Harris, is a spy for the Diamond Kingdom.
 * 4) Bulls (暴牛): Recognizing Noelle's wand, Fanzell asks the Black Bulls for help in locating Dominante. However, a group of Diamond Kingdom mages is hunting the deserters and attacks the base. Mariella, who has been changed by Asta's words, betrays Galleo and the other assassins and helps reunite Fanzell and Dominante.

Trivia

 * Fanzell's grimoire design is the background for the cover.
 * The cover illustration lines up with the cover illustration of Volume 7.