You could start by looking at official bookstores, both physical and online. Big online retailers like Barnes & Noble might carry it. If it's a translated work, check stores that focus on imported books.
Another great place is BookWalker. It offers a large collection of light novels, both in digital and sometimes even in limited - edition physical copies. They often have exclusive deals and early releases for certain titles. Additionally, some light novels can be found on websites like J - Novel Club. They focus specifically on translating and publishing light novels, so you can discover many interesting and unique titles there.
Some libraries may have digital copies available through their e - lending services. Check with your local library or libraries in your area that have a good collection of light novels. Another option could be to search for it on some specialized light novel reading websites, but make sure they are legal and legitimate sources.
Another option could be to check your local library. Some libraries have a section dedicated to Japanese light novels, and they might have Haganai in their collection. If not, you can ask the librarian if they can order it for you.
Another option could be to look for it in second - hand bookstores. You might be able to find a physical copy of the Katanagatari light novel there. And if you're part of any anime or light novel fan communities, asking around in those groups might also lead you to a good source for reading it.
You can try some well - known e - book platforms like Amazon Kindle. It has a large collection of light novels, and you can easily find many completed ones there. Just search for the genre or specific title you're interested in.
You can try some official e - book platforms like Amazon Kindle or Kobo. They often have a wide range of light novels available for purchase and reading.