Published Tuesday, 10 December 2013
Irish actor Chris O'Dowd. (© Getty)
The award-winning programme tells the story of 11-year-old Martin Moone and his imaginary friend Sean, played by O'Dowd.
The show was initially to be a one-off on Sky 1 before being signed for a six-part series with another two to follow.
O'Dowd has teamed up with the show's co-creator, Nick Vincent Murphy, to write the books, with the first one due out next autumn.
The pair has signed a six-figure deal with publisher Macmillan for the books which are aimed at children aged eight and over and will include illustrations by Oscar-nominated animators Cartoon Saloon.
O'Dowd and Murphy said: "Throughout the first three series of Moone Boy, it's often occurred to us that there's so much more we could do with the world of the imaginary friends, but the hassle of having to film things with our big clumsy cameras made it tricky to delve too much into it in the show.
"However, this feels like the perfect world in which to explore novels for a younger audience, with plenty of opportunities for fun doodles and illustrations by Cartoon Saloon.
"There will be lots of jokes and we hope that parents will want to steal the books from their children to read them too."
Macmillan's Venetia Gosling said she was "over the moon" to be publishing the books.
She said: "I loved the first Moone Boy TV series and saw immediately how well the characters and scenarios could work in book form.
"Chris and Nick's writing is so warm and funny, with such a strong sense of family and community, that I know these stories will hold huge appeal for all ages and I'm very excited to be part of the team introducing Moone Boy to readers both here and abroad."
© UTV News