The parents had to prove that they suffered offence and damages from the book but, it is obvious, that they failed. They were unable to prove that they suffered from depression, insomnia, etc. No medical proof whatsoever. There were three other books written about the case in Portugal and these books didn't bother the McCanns? Maybe the difference is that the other books didn't make as much money. The judge did ask Gerry McCann if he knew about the other books, so she must have done her homework.
The others may well have caused some damage as well. However, as far as I'm aware, the others did not have extensive pre- and post-publication coverage in the written press and on TV.
Neither were they written by the chief detective on the case (with the credence that that role implies) claiming that everything in it is the conclusion of his team and is in the files. Although some aspects are indeed in the - half-time - files, others aren't.
When it is made clear that he is only presenting the PJ's hypothesis up until he left, what was investigated after he left wasn't relevant as it was somehow part of a political coverup.
Few readers would take the time to actually wade through the files, as it's far easier to rely on an easy-to-read book and "documentary" by the lead detective.
Some aspects that
are based on the files contain head-scratching errors of comprehension, but casual readers wouldn't realise that. Neither would they realise that a number of matters were later clarified by the rest of the files.