Online platforms like Amazon or Barnes & Noble's website could be good places to search for the 'kouritsu kuriya madoushi light novel'. Also, some specialized anime or manga stores' online shops might stock it.
One of the main themes is probably magic. Since it's in the title'madoushi' which means magician. Another could be adventure as it is often a common theme in light novels.
I haven't read this light novel specifically. But generally, in a light novel about the strongest wizard at ten years old (assuming 'juu sai' means ten years old), we can expect themes like the character's journey to master magic, facing challenges from other magic - users, and growing in power and wisdom.
The title 'kuusen madoushi kouhosei no kyoukan light novel' gives some hints. 'Kuusen' could potentially refer to a sky - related concept, like perhaps a sky kingdom or a power that comes from the sky. 'Madoushi' clearly indicates magic users. 'Kouhosei' might be students or apprentices. So, it could be a story about young apprentices of magic in a world where the sky has some important role, perhaps they are learning magic and facing various challenges in a world filled with magic and sky - related phenomena.
Perhaps its special feature could be the young age of the main character, being just ten years old (again, assuming 'juu sai' is ten years old) while being the strongest wizard. This creates an interesting contrast and potential for growth and development throughout the story.
You can try looking for it in local bookstores that specialize in Japanese light novels or anime - related merchandise. Some large chain bookstores might also carry it if they have a section for imported books.
Sure. 'A Certain Magical Index' is a great one. It has a richly detailed magical world and interesting characters. Another one could be 'Overlord'. It features a powerful protagonist in a game - like fantasy world. And also 'Re:Zero − Starting Life in Another World' which has a unique take on the isekai genre with a complex plot.