Gonçalo Amaral did not make the accusations, these accusations were the conclusions of the interim report. The McCanns and their team started this whole libel case off because of the insults made about Gonçalo Amaral, even after he was taken off the case. He wrote the book to defend his honour and that of the PJ and the judicial authorities since his superiors did nothing about the insults from the press.
So The Investigation wrote the book, did it?
Goncalo Amaral authored a book, littered with falsehoods that lower reputation, for which he has sole and exclusive (ir)responsibility.
I've pointed out before and happily repeat that if Amaral had let everything lie within the process, he'd be fine.
Kate's father cannot touch Tavares Almeida for his falsehood that Mr Healey confirmed that the McCanns sedated their children, for example, because Almeida has never repeated that falsehood outside the process.