'Nobody does it better than Horowitz, as this deliciously frightening, supernatural thriller proves. Best read with all the lights on!' Publishing News
'Gripping, full of suspense, and as twisty as an Alpine pass. Matt Freeman's adventures eclipse even those of the formidable Alex Rider.' David Robinson, The Scotsman
'The first in a quintet of supernatural adventuresand if the other four are as good as this one, Horowitz fans are in for a treat… So taut and scary that it had me looking over my shoulder.' The Children’s Buyer's Guide
'A supernatural adventure of the most chilling kind.' The Times
'After success with teenage superspy Alex Rider, Anthony Horowitz has a new plan ... to be the 'Stephen King for kids'.' The Scotsman
'Horowitz introduces a sinister, supernatural element, which has Matt wrestling with demons, devil worshippers, human sacrifice and other gruesome stuff.' The Guardian
'An amazing book in which ancient witchcraft meets nuclear power.' Bristol Evening Post