The case is Hachette v. Internet Archive, searching for controlled digital lending also works.

Here are some links collected by UMass: https://blogs.umass.edu/copyright/cases-and-statutes/hachett...

ArsTechnica has an article (from 2020) on the topic which seems somewhat balanced and seems to have interviewed some legal experts:

https://arstechnica.com/tech-policy/2020/06/publishers-sue-i...

A complete discussion by a lawyer directly writing might be better, but I haven't seen one that isn't working for, or aligned with, one side or the other.