New book: Permanent Record
Google his name or the book's, plenty of articles.
https://www.amazon.com/Permanent-Record-Edward-Snowden/dp/1250237238
https://www.wired.com/story/after-six-years-in-exile-edward-snowden-explains-himself/
Lots of stuff not in his book.
Snowden’s book doesn’t mention a job at ‘one of Russia’s biggest websites,’ and former CIA officials suspect a darker reality
https://finance.yahoo.com/news/snowden-book-life-exile-russia-100156358.html