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George R.R. Martin oversees Game of Thrones adult colouring book

George R. R. Martin will be overseeing the release of the Game of Thrones Colouring Book, featuring 45 new black and white illustrations by leading fantasy illustrators that are inspired by his A Song of Ice and Fire novels, Bantam announced Monday.

Book will have 45 new illustrations by leading fantasy illustrators

A new adult colouring book inspired by the Game of Thrones series will be out this October. (Helen Sloan/HBO/The Associated Press)

George R.R. Martin is joining the adult colouring book game.

Bantam announced Monday that Martin will be overseeing the release of the Game of Thrones Coloring Book, featuring 45 new black and white illustrations by leading fantasy illustrators that are inspired by his A Song of Ice and Fire novels.

The book is scheduled for release this fall and represents another interim project from Martin as his millions of fans await the next installment of his series. Last year, Martin collaborated on The World of Ice and Fire: The Untold History of Westeros and the Game of Thrones, an illustrated guide.

Adult colouring books have been one of this year's hottest genres, led by Johanna Basford's Enchanted Forest and Secret Garden.