Min-woo Hyung, Priest, vol. 4: Harbinger's Song (Tokyopop, 2003)
At the end of vol. 3, a contemporary researcher found the diary of Ivan Isaacs, and here we have the first part of it. We learn about Ivan's home life as a child and the beginnings of his time in the priesthood, as well as his researches into the crusader who would eventually becomes his arch-nemesis, Temozarela. It's all backstory, but it's good backstory; not much action but a lot of solid character development in this storyline. *** ½