Brook explained that she was disappointed the pair chose to document her short-lived stint on Britain's Got Talent.
"I thought, 'Oh come on, do you really need to use me to sell your book?'" she told the Daily Star.
"There was a point when I just went, 'No, f**k off'. But I wasn't going to have two of the most powerful men in TV kick me when I was down."
Brook also insisted that it had been her decision to leave the ITV show, adding: "The reason I responded is because Ant & Dec chose to write about me."