You can try checking online bookstores like Amazon. They usually have a wide range of light novels available for purchase.
Some specialized anime and manga stores might carry it. Also, libraries in some areas might have it in their collections, especially those with a good selection of Japanese literature. Another option is to look for it on e - book platforms.
Well, first, you could look for it on official Japanese light novel retailers' websites. If you're looking for an English translation, some well - known English - language book retailers that focus on imported or niche literature might have it. Additionally, you can search for fan communities related to the light novel. Sometimes, they can give you good advice on where to find it, whether it's in physical or digital form.