Chromedriver is not a python module. It can't be installed with pip. What you installed was an ancient python helper used to download ancient versions of chromedriver. You could try installing chromedriver-py with pip, but that would likely require you to manually modify the bookp.py script for the script to be able to locate it.
The chromedriver binary comes with the Chromium browser package, or it can be
installed manually on its own. you could also see if it's your distro's repository.