Oh man, I love poking around for audiobook versions of light novels — it feels like treasure hunting. For mainstream, officially released audiobooks the big places I check first are Audible (including Audible Japan), Apple Books, Google Play Books, and Kobo. Many English publishers — think the usual suspects — sometimes release audio versions through those stores, and Audible often has exclusive narrations. Another great route is library apps: Libby (OverDrive) and Hoopla will occasionally carry light-novel audiobooks, and I’ve snagged a few gems there for free with my library card.
If you’re dealing with Japanese originals, Audiobook.jp and Audible Japan have a lot more native releases. Smaller publishers like J-Novel Club, Yen Press, Kodansha, and Seven Seas occasionally announce audio editions on their sites or social channels, so I follow them to catch new drops. For series that don’t have official audiobooks, I sometimes use my legally purchased ebook plus a high-quality text-to-speech app for personal listening — more on that below.
One quick tip: preview narrators where possible before buying. A great narrator can make or break a light-novel listen. I usually pair official purchases with a wishlist on Audible and a watchlist on publisher pages, and that setup rarely lets me miss a release.