Revenge is likely a main theme. As the title 'fukushuu kyoushitsu' (which might mean 'Revenge Classroom' in English) suggests, there could be elements of characters seeking revenge within the school setting.
Well, without having read the 'spy kyoushitsu light novel' myself, it's hard to say exactly. However, based on the title, it seems likely that it has a story centered around a spy in a classroom. Maybe the spy has been sent to gather intelligence on a particular person or group within the school. It could also involve the spy having to balance their secret identity with fitting in as a normal student, which would create a lot of tension and interesting plot twists. There might be other elements like rival spies or unexpected allies within the school community as well.
Since I haven't read this particular 'fukushuu o koinegau light novel', it's hard to say for sure. However, generally in light novels, if it has 'fukushuu' in the title which means revenge, it could center around a character seeking vengeance for some wrong done to them. It may involve a complex web of relationships, power struggles, and a journey of the protagonist towards achieving their revenge, all while set in a fictional and often fantastical setting that is characteristic of light novels.
One special thing could be its unique plot. It might have an interesting story line that combines elements of heroism and classroom settings. This could lead to engaging character development as students in a classroom might be on a journey to become heroes or deal with heroic themes within the academic environment.
I'm not sure specifically as I haven't read this light novel. But generally, a 'light novel' often contains elements like adventure, fantasy, and character development. Maybe 'fukushuu o koinegau saikyou' could involve a story about seeking the strongest power related to revenge.
The 'Sairin Yuusha no Fukushuu Hanashi Light Novel' could potentially revolve around a hero's quest for revenge. Maybe the hero has been wronged in some way, perhaps betrayed by comrades or facing injustice from an enemy. The light novel might then detail his or her path to get back at those who have wronged them, with various adventures, character developments, and challenges along the way.
You can try looking for it in local bookstores that carry a wide range of light novels. Some big - name chain bookstores usually have a section dedicated to Japanese - style light novels.
As I haven't read the 'fukushuu o koinegau saikyou light novel', there's no way for me to determine the main characters. It could be a young hero seeking revenge, or a group of characters with different motives all related to the idea of becoming the strongest in the context of revenge.
Online platforms like Amazon Japan might have it. Also, some specialized Japanese literature or anime - related websites may sell or provide information about this light novel. Check out websites that focus on Japanese light novels in particular.