Permanent Record

A little slow and biography-like in the 1st half, leading into an incredibly strong 2nd half providing a detailed view into American government surveillance, insight into how government systems operate (technically, socially, politically), and a gripping tale digging into the gritty details of how he actually extracted the information and executed on the leak. I doubt there's another read like this. Huge appreciation for the transparency of this book.

Would also recommend Snowden's 3-hour long Joe Rogan podcast, packed with interesting viewpoints.