Here is a PDF of the book you need for this course, you may not share it and the file will self destruct the day after finals. Thanks for the $150
The younger teachers were doing something similar to this. Teachers have to follow certain sets of rules to not get fired.
It was mostly the oldest, gray-haired teachers that were requiring textbooks. Stuck in their old ways.
At least you OWN the text book and can reference it years later. That PDF scam was a real piss off
That might work in other domains other than computer sciences.
But from my experience, nobody cared about books and papers in computer science. Everyone is more comfortable with technology.
You can easily Google or find things on the internet.