This novel is very interesting for many reasons. At the beginning we follow Lina at the Guild. We learn that they don't believe her when she tells her story and her fights. This is funny. And she has to investigate on the invasion of lesser demons altough she doesn't want to do this mission. The second reason I like this novel is thanks to the final boss that Lina, Gourry, Luc et Milina have to fight. This battle show how those 4 characters have evolved and learn together since their first meeting. At the end Lina meets 2 characters which are really surprising! And we learn something HUGE!
Maybe this novel is a little too long and by consequence is a little annoying in the middle. But read it until the end.... it may worth it!