You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

booklab
0.8b12

This version was deleted from PyPI around 2025-10-06. Installing fails with:
$ pip3 install booklab==0.8b12 ERROR: Could not find a version that satisfies the requirement booklab==0.8b12
View other deleted versions of booklab

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2025-10-05/ \ booklab==0.8b12
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
booklab-0.8b12-py3-none-any.whl (1.9MB)
booklab-0.8b12.tar.gz (1.7MB)