Federal prosecutors have withdrawn a subpoena seeking the identities of thousands of people who bought used books through online retailer Amazon.com Inc., newly unsealed court records show.

The withdrawal came after a judge ruled the customers have a First Amendment right to keep their reading habits from the government.

"Well-founded or not, rumors of an Orwellian federal criminal investigation into the reading habits of Amazon's customers could frighten countless potential customers into canceling planned online book purchases,"

"The subpoena is troubling because it permits the government to peek into the reading habits of specific individuals without their knowledge or permission," Crocker wrote. "It is an unsettling and un-American scenario to envision federal agents nosing through the reading lists of law-abiding citizens while hunting for evidence against somebody else."