Former Deputy Prime Minister Winston Peters is hitting back at claims made in a new book about the National Party.

Blue Blood, by former Stuff and TVNZ political reporter Andrea Vance, catalogues the transition from the Key years to the turmoil of the Party's time in Opposition.

The book claims that in 2017 coalition negotiations, Peters was offered Deputy Prime Ministership in the 11th hour of negotiations.

But, in a statement, Peters says the offer was on the table on the first day day Labour and NZ First sat down to discuss terms.

Newstalk ZB Chief Political Reporter joined Andrew Dickens to discuss.

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