Lieff Cabraser Heimann & Bernstein and Cowan, DeBaets, Abrahams & Sheppard filed a class action on behalf of lead plaintiff Christopher Farnsworth, author of the “Nathaniel Cade” fiction series, against Meta on Tuesday, claiming it stole “hundreds of thousands” of copyrighted books from a pirated online collection to build its large language model set, “Llama.”