Patrick Ness wrote A Monster Calls.
A Monster Calls is a 2016 dark fantasy drama film directed by J. A. Bayona and written by Patrick Ness , based on his novel of the same name . Patrick Ness . He is best known for his books for young adults , including the Chaos Walking trilogy and A Monster Calls . Ness won the annual Carnegie Medal from the British librarians both in 2011 and in 2012 , for Monsters of Men and A Monster Calls , recognising each as the best new book for children or young adults published in the U.K. He wrote the screenplay of the 2016 film adaptation of A Monster Calls , and is the creator and writer of the Doctor Who spin-off series Class .