Prince Andrew's team tried to hire internet trolls to "hassle" his accuser, Virginia Giuffre, she said in her posthumous memoir.
The allegations come as the UK's Metropolitan Police say they are looking into claims Andrew passed Giuffre's date of birth and social security number to his bodyguard in a bid to dig up dirt for a smear campaign.
Pressure is growing on the royal family to go further by backing a move to formally strip Andrew of his dukedom through parliamentary legislation, after he relinquished use of his Duke of York title last week.
Giuffre, in her book Nobody's Girl, which is being published on Tuesday, described how she dressed in outfits that reminded her of her idols Britney Spears and Christina Aguilera to first meet Andrew when she was 17.
She was pictured in the "p