You can try some online platforms like Project Gutenberg. It has a collection of classic novels, and some of them might be Christian romance novels that are free to read. Another option is to check your local library's e - book collection. Many libraries offer free e - books that you can borrow and read on your device.
Some independent Christian authors may offer their romance novels for free on their personal websites or blogs. You can search for 'Christian romance novels free' on a search engine, and it may lead you to these individual author sites. Keep in mind that the availability might vary, but it's worth exploring.