There are a number of ... not-very-good books on the subject (I picked up Carolyn Kennedy's 1990s effort, it's ... poor).
A challenge is that privacy itself is an emergent concept (this is my view, not one widely shared), which is a response to ever-more invasive or capable technologies. As such, much of the relevant caselaw and legal thinking is fairly new, and reflects advances in publishing (Brandeis and Warren), recording, transmission, and detection.
There are some historical antecedants.
Some of the more interesting non-legal-scholar work has come from Jill Lepore in recent years. I'd suggest her work as at the least a good entry point. She's a historian, and should be copiously documenting sources which may be of interest. Unseen: A History of Privacy (2013) https://scholar.harvard.edu/jlepore/presentations/unseen-his...
A challenge is that privacy itself is an emergent concept (this is my view, not one widely shared), which is a response to ever-more invasive or capable technologies. As such, much of the relevant caselaw and legal thinking is fairly new, and reflects advances in publishing (Brandeis and Warren), recording, transmission, and detection.
There are some historical antecedants.
Some of the more interesting non-legal-scholar work has come from Jill Lepore in recent years. I'd suggest her work as at the least a good entry point. She's a historian, and should be copiously documenting sources which may be of interest. Unseen: A History of Privacy (2013) https://scholar.harvard.edu/jlepore/presentations/unseen-his...
The Unwanted Gaze by Jeffrey Rosen (2001) addresses concerns as the Internet age was beginning to mature. https://www.worldcat.org/title/unwanted-gaze-the-destruction...
The EFF and ACLU have extensive resources on privacy, though not necessarily of specific legal focus:
https://www.eff.org/issues/privacy
https://www.aclu.org/issues/privacy-technology
For current legal opinion, Solve and Schwartz might be a standard (I honestly don't know, though it gets prominant mention):
https://www.worldcat.org/title/privacy-law-fundamentals/oclc...