One Direction are set to unleash two brand new books in 2014.

The boyband's merchandise conveyor is showing no signs of slowing down and publisher HarperCollins have confirmed more books will be released this year.

They will unleash an autobiography in September to tie in with their massive Where We Are world stadium tour of the same name. It will be hardback and it will cost £20.

Publisher Natalie Jerome said: "It’s a hugely exciting departure from the books we’ve published with them so far and there’s a lot we’re going to be doing that will make this an extra special experience for their loyal and devoted fans."

HarperCollins have also secured the rights to the band's 2015 annual, which will be released in August.

It will include exclusive features and photos and it is set to be a perfect Christmas present.