I thought about this question for a while, because I don’t usually look for books based on where they are set (although an intriguing setting will often entice me to pick up a new book).
However, I know a lot of readers do location-based reading challenges, so the answer to this question is important for filling in the gaps!
When I review books, I do try to include the location in my review or in the tags so I can find the book again, and I know some other reviewers do this as well (I admit I got the idea from Narelle Atkins). That helps me locate books set in specific locations again in the future, and I hope it helps other readers.
If I did need to find a book set in a specific location, I can think of three places I’d look:
1. Amazon
I would search the location name on Amazon, in the hope that authors writing in different locations would include that in their subtitle or book description.
2. The Story Chats Podcast
The Story Chats @ Inspy Romance podcast has (sadly) closed down, but the old episodes are all available through Apple Podcasts, Spotify, and YouTube. The team did a whole series of episodes on locations.
3. Avid Readers of Christian Fiction on Facebook
If all else fails (or if you want to save yourself a search), the Avids always come through with a veritable trove of suggestions, not matter how obscure your question. I am not responsible for how much your bank account will suffer should you ask.