“Drawing a bow means taking and losing lives. But Father, if I do not take a life... If I do not take a life, I cannot go on living.”
The words of god conveyed to Yona through the priest Ik-Soo are to find the four Dragon Warriors of Kouka Kingdom's Legend of the Four Dragons.
It's a book on the legend of the four dragons.
إنّه كتابٌ يحكي عن أسطورة التّنانين الأربعة
Es ist ein Buch über die
Vier-Drachen-Legende.
Es un libro sobre la leyenda 
de los cuatro dragones.
Es un libro sobre la leyenda 
de los cuatro dragones.
C’est la légende
des quatre dragons.
Narra la leggenda dei 4 dragoni.
É um livro da lenda de quatro dragões.