IN NOVEMBER 2005, three senior aides to Britain’s royal family noticed odd things happening on their mobile phones. Messages they had never listened to were somehow appearing in their mailboxes as if heard and saved. Equally peculiar were stories that began appearing about Prince William in one of the country’s biggest tabloids, News of the World. The stories were banal enough (Prince William pulled a tendon in his knee, one revealed). But the royal aides were puzzled as to how News of the World had gotten the information, which was known among only a small, discreet circle. They began to suspect that someone was eavesdropping on their private conversations. By early January 2006, Scotland Yard had confirmed their suspicions. An unambiguous trail led to Clive Goodman, the News of the World reporter who covered the royal family, and to a private investigator, Glenn Mulcaire, who also worked for the paper. The two men had somehow obtained the PIN codes needed to access the voice mail of the royal aides. Scotland Yard told the aides to continue operating as usual while it pursued the investigation, which included surveillance of the suspects’ phones. A few months later, the inquiry took a remarkable…