THE publisher of British right-wing Breitbart contributor Milo Yiannopoulos has pulled the plug on his controversial planned book.

Simon & Schuster and its Threshold Editions imprint announced on Monday that "after careful consideration" they had pulled the book, Dangerous, which had been high on Amazon.com's best-seller lists.

The announcement came hours after the Breitbart editor was disinvited to this year's Conservative Political Action Conference in the US after video surfaced online that showed him discussing the merits of gay relationships between adults and boys as young as 13.

He has said remarks he made that could be construed as favouring men and boys having sex were edited wrongly.

Dangerous was originally due to come out in March, but Yiannopoulos had pushed back the release to June so he could write about the uprisings during his recent campus tour, in which he mocked transgender students.

He was also banned from Twitter last year after leading a campaign of abuse against black Ghostbusters actress Leslie Jones.

More than 100 Simon & Schuster authors had objected to his book deal, announced last December, and Roxane Gay withdrew a planned book.

Some bookstores had said they would not sell his book, although the National Coalition Against Censorship and other free speech organisations had defended the publisher.

Threshold is a conservative imprint that has published books by Republican US president Donald Trump and former vice president Dick Cheney, among others.