Pauline Hanson's new book has reignited her long-running war of words with her One Nation co-founder, with David Oldfield describing the firebrand senator as a "fraud" who has "never had an original thought".

Senator Hanson this week released a collection of speeches to Parliament - made in both her original 1990s incarnation in the lower house and since returning to Canberra in 2016 - called Pauline: In Her Own Words.

But Mr Oldfield - Senator Hanson's one-time confidant and a former deputy leader of the party he helped create - has rubbished the book and its title, saying the speeches contained within are not her words at all.

Pauline Hanson and David Oldfield at a One Nation function in 1999. Credit:Robert Pearce.

"Not only are they not her words, they're not her thoughts," said Mr Oldfield, who went on to his own career in NSW politics and then reality TV. "Pauline didn't have any original thoughts. She's never had an original thought."