HOW AMERICA LOST ITS SECRETS
Edward Snowden, the Man and the Theft
Edward Jay Epstein
Alfred A Knopf
350 pages; $27.95
People who reveal secrets are either heroes or betrayers, depending on what the secrets are and on the inclinations of the audience for them. In the case of Edward Snowden, who took and then released a great deal of internal data from the National Security Agency (NSA) in 2013, his admirers have campaigned for a last-minute pardon by President Obama, but Donald Trump has mused that execution might be more appropriate. Journalism based on Mr Snowden’s revelations won the Pulitzer Prize for public