Hmmm.I wonder if he did it for a laugh, knowing the book didn't exist. Or if he had something against the author and wrote the review he would have written anyway, had he bothered to read the book, which he assumed existed.
From another article:'The newspaper has made an "unreserved apology" to Mattsson. Lundberg's apology was more qualified. He told Svensk Bokhandel magazine that he had "got worked up in advance about Britt-Marie Mattsson because I detest her so very greatly. But let's hope the book is published so I get the chance to say it for real."'