Website: https://www.theusreview.com/
The US Review of Books offers a nice little archive of books to discover, and as the name suggests, they also review books–from self-published works to ones handled by traditional publishers. Many of the books mentioned on their site are mostly those that haven’t received too much publicity in mainstream media, but they still have a great deal of heart put into them. I might be a bit biased as a new book reviewer for them, though.
Even so, they are a great place to know about and check out!