"The royal family has always been viewed as an august, fabulous family.
But these allegations are so grave that our trust in them is seriously damaged," said Jenny Madestam, a political analyst.
"It has been very stressful," Ms Rauscher told The Sunday Telegraph.
The authors also uncovered evidence of how a Serbian gangster, Mille Markovic, hosted parties for the King and his friends at an underground club in Stockholm, below the National Police Department.
"It had been a party all the time and lots of champagne and money," she said.
When her modelling and pop career faded, she said: "I became distant and drank constantly.
Mr Markovic told a Swedish newspaper yesterday: "I've got live evidence. Over 80 per cent say that the lurid allegations have not changed their perception of the King – and almost 50 per cent say that it is wrong for journalists to look into the private lives of their royal family.Indeed, the allegations that the king frequented Mafia-run clubs and used the state police to hide the evidence are extremely serious.The book's authors, Thomas Sjöberg, Tove Meyer and Deanne Rauscher, spent two years unpicking the complicated story behind the throne.His handling of the book's publication has shocked some observers."Now is the time for the King to be quiet and give no comments."The King is not even denying it." Indeed, the King's bizarre press conference on Thursday – held in a forest after an elk hunt – only served to fan the flames of interest."I have spoken with my family and the Queen and we choose to turn the page and move forward because, as I understand, these are things that happened a long time ago," he said – standing in a field, still dressed in his wax jacket and hunting clothes, among a sea of camera crews and reporters."He was only 27 when he took office, in the midst of his bachelor years, with girls, booze and 'the lads'," they wrote."Then he suddenly became king, and had to promise the people to be a loving father.Instead, he says yes to a press conference in the middle of the forest where anything can happen.It is like playing Russian roulette," said Paul Ronge, a PR expert, in the Svenska Dagbladet newspaper. It is beneath his dignity to even comment a gossip book about his private life.