https://github.com/executablebooks/sphinx-book-theme https://github.com/executablebooks/sphinx-book-theme/blob/main/section1/ntbk.ipynb?plain=1 https://github.com/executablebooks/sphinx-book-theme/edit/main/section1/ntbk.ipynb https://github.com/executablebooks/sphinx-book-theme/issues/new?title=Issue%20on%20page%20%2Fsection1/ntbk.html&body=Your%20issue%20content%20here.