Claim: A Monster Calls is based on the horror novel of the same name.
Evidence: 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.
A Monster Calls is a low fantasy novel written for children by Patrick Ness , from an original idea by Siobhan Dowd , illustrated by Jim Kay , and published by Walker in 2011.