I’ve been reading this book about law for computer scientists (and other folk), by Mireille Hildebrandt. I like how she frames it in the beginning, saying architecture is a common feature of law and computer science. There are chapters about privacy and data protection, exploring the origins and theory behind the concepts and how they are protected in law, particularly in Europe with the GDPR. This includes written law and what actually happens in courts, with several examples of case law.
There’s a link to the open access PDF somewhere on the page: