This book is fun to read and it is caught by the story from the first pages. This is a very good semi-fantastic story that mixes warrior with supernatural powers in medieval Japanese tradition. The 7 spears Aizu holders are evil samurai secret techniques passed down from generation to generation in some families only. 7 These warriors are at the service of a feudal lord (daimio) corrupt and perverse. Opposite, 7 young women seeking revenge trained and helped by another great warrior but completely illuminated. In this context governed by feudal Japanese bushido (samurai moral code), the struggle between these women and bloodthirsty samurai engages with touches of humor, tenderness and horror. The mixture of all these ingredients provides a pleasant and entertaining reading while having the advantage of giving you ideas on the historical japan.