Maryland Library e-book "battle"

 Publishers Weekly has an excellent article about the court battle between the Association of American Publishers and the new Maryland library e-book law. According to the article, the AAP doubled down on their claim that Maryland’s library e-book law is clearly preempted by the federal Copyright Act, and said supporters of the law are seeking to “unravel decades of federal legislation and jurisprudence that delineate the contours of copyright law.”
The article has links to the court filings.