Some privacy watchdogs argue that e-book users should be protected from having their digital reading habits recorded. "There's a societal ideal that what you read is nobody else's business," says Cindy Cohn, legal director for the Electronic Frontier Foundation, a nonprofit group that advocates for consumer rights and privacy. "Right now, there's no way for you to tell Amazon, I want to buy your books, but I don't want you to track what I'm reading."
Amazon declined to comment on how it analyzes and uses the Kindle data it gathers.
EFF has pressed for legislation to prevent digital book retailers from handing over information about individuals' reading habits as evidence to law enforcement agencies without a court's approval. Earlier this year, California instituted the "reader privacy act," which makes it more difficult for law-enforcement groups to gain access to consumers' digital reading records. Under the new law, agencies must get a court order before they can require digital booksellers to turn over information revealing which books their customers have browsed, purchased, read and underlined. The American Civil Liberties Union and EFF, which partnered with Google and other organizations to push for the legislation, are now seeking to enact similar laws in other states.