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’

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.

WGA West building in Hollywood