I’ve been improving the profile screen in the new Epilogue to support adding external blogs via Micropub. You will still manage your bookshelves with Micro.blog, but the posts can go to another blog.
Here’s a screencast video that shows off most of the UI for searching for books, adding books to a shelf, and configuring an external blog. In this case it uses the IndieAuth and Micropub plugins for WordPress.
✴️ Also on Micro.blog