Wally Skalij/Getty Images Meta's AI endeavors have drawn another legal challenge. The social media company and its CEO Mark Zuckerberg are facing a class action lawsuit from five book publishers and one author on claims that it illegally used copyrighted works to train its Llama generative AI platform. The plaintiffs in the case are Hachette, Macmillan, McGraw Hill, Elsevier and Cengage; they're joined by best-selling author Scott Turow. "Defendants reproduced and distributed millions of copyrighted works without permission, without providing any compensation to authors or publishers, and with full knowledge that their conduct violated copyright law," the complaint reads. "Zuckerberg himself personally authorized and actively encouraged the infringement." Meta has been sued multiple times regarding the materials it used to train Llama. A different group of authors attempted a copyright infringement lawsuit in 2023, but were ultimately unsuccessful in the effort.…