I’ve been following this story for a minute. The gist is a bestselling author writes a book. Some time later, she’s approached by reviewers (plural) of a different book who tell her the new book is just hers with naughty bits.
Author 1 approaches Author 2, & A 2 weaves together these increasing elaborate lies until final the US Federal Courts are involved.
This article sums up the court situation nicely & makes for fascinating reading.