From EFF:
California Senator Leland Yee has introduced the Reader Privacy Act of 2011 (SB 602), with backing from the California Affiliates of the American Civil Liberties Union (ACLU) and the Electronic Frontier Foundation (EFF). The law would bring a much-needed upgrade to match Californians’ reading habits. Under SB 602 the government and other third parties would need a warrant or court order for access to sensitive reading records. This would establish protections for book records–both e-books and in physical bookstores–in line with long-established protections for library records and other expressive material. The bill mirrors the privacy and free speech safeguards in the California constitution and other areas of California law.
Read the full press release on EFF.