The Aussie former editor of the National Enquirer is pressuring Down Under booksellers to pull Ronan Farrow’s new tome, saying its claims that he tried to help thwart the writer’s investigation into Harvey Weinstein are defamatory, reports said Tuesday.

Lawyers for Dylan Howard, now a top exec with American Media Inc., which owns such supermarket tabloids as the Enquirer and Star, wrote to book sellers last month that “our client has put the publisher, Little, Brown Book Group Limited (in the USA and UK) and Hachette Australia Pty Ltd … on notice that if the defamatory content is included in the book, we are instructed to take such legal action as may be appropriate,” the Guardian said.

The missive added that the booksellers could be open to legal action, too, if they peddle the tome, which went on sale Tuesday.

Australia has considerably lower standards for legally proving libel compared to the US, experts say.

Customers who ordered “Catch and Kill’ from at least one Australian online book seller, Booktopia, have already been told it was “withdrawn from sale” and offered refunds, the Guardian said.

A link to the work on Booktopia’s website read Tuesday, “Sorry, the book that you are looking for is not available right now.”

An incensed Farrow tweeted Tuesday, “Some Australian outlets — Booktopia, Amazon Aus — caved and banned it due to frivolous legal threats free speech group @PENamerica called a ‘reprehensible attempt at censorship’ from AMI’s Dylan Howard. Thanks to all complaining and defending the free press.”

He then followed up with, “I’m sorry to all the Australian readers to whom this story is important too. I hope you can import or buy from an independent bookseller, and avoid outlets that yield to these kinds of intimidation tactics.”

Farrow’s book includes details of what he says were attempts by Weinstein — and pals such as Howard — to thwart his investigation into sex-abuse accusations against the Hollywood producer.