Hartswood optionedThe Warlock Effectfrom publisher Hodder & Stoughton, fending off rival bids from seven other production companies.
Vertue said: This book is a rollercoaster.
We couldnt put it down and when we make it, audiences wont be able to switch it off.

Andy Nyman (left) and Jeremy Dyson (right) with their book ‘The Warlock Effect’Getty/Hodder & Stoughton
He has also written onKilling Eve.
Nyman has frequently worked with Derren Brown and has starred in shows includingPeaky Blinders.
