Try out the release candidate for this theme here:

https://github.com/executablebooks/sphinx-book-theme/releases/tag/v1.0.0rc1

Install with

pip install -U --pre sphinx-book-theme

If you see anything wrong, open an issue and cross-link it here! (or just comment if you wish)

This one makes a number of breaking changes, so I'm bumping the major version (see #670 which this will close when it is released).