Judith Collins to release autobiography ahead of election

Judith Collins has finished writing her book, but is keeping mum on the title.

The veteran National MP revealed in August on The AM Show she was working on a book about her life and career in Parliament, and buckled down to finish it over the summer break.

"I've finished it. Sent it off to the publisher yesterday," she told The AM Show on Friday.

Despite her firebrand reputation and rocky time in Parliament, Collins insists it's a "nice, positive book".

Last year, she said it "will not be boring".

"It will not be one of those 'on today I did X', I mean who cares? I have had, you know, so far I have only 17 years of my political career so far, and when I think about stuff in Opposition, campaigns, various things, there are some great stories... I think people will be a little surprised at some things, and they will probably be very intrigued by the way in which things operate." 

She won't reveal the title yet, but said it would be out in four months - just a few months before the election.

"In New Zealand to be fair, we get elections every three years," she said. "By the time you actually get the thing written, it's always someone's election year, isn't it?"

Parliament Speaker Trevor Mallard, a former teacher, offered Collins his services as a proofreader.

"If it was anyone else I'd offer to grammar check but in your case I know there is really no need," he wrote on Twitter. "Happy to double-check though."

Collins liked the tweet.

She won't be first MP to write a book - ACT leader David Seymour and his predecessor Richard Prebble, ex-National MP Marilyn Waring, former Prime Minister Helen Clark and Labour MP Deborah Russell are all published authors.