Amongst mountains as old as time, the jackalopes and ghouls are the least of your worries…Working in Human Resources was not what Alexys had in mind when she joined Entity, the company who categorise and manage the monsters and cryptids of the world. But after her dad was killed as a Warden in the Appalachian mountains, she was filled with noble ideas of carrying on his legacy... from behind the safety of a desk.

But when one of her new Wardens, Elliot, goes missing, her chances of promotion go missing too. Determined to find him safe and sound, she marches off into the mountains to find him herself. Because Elliot had been talking about sightings of a highly dangerous and never-recorded monster, The Hollow Walker, and she's promised herself that no Warden will ever die on her watch.

Meanwhile Nic, Director of Research and Categorisation, is not one to ignore the words 'never-recorded'. With Alexys, his work nemesis, leading the charge into the mountains, he's not going to let her have all the fun. If he can be the youngest Entity employee to discover a new monster, his name will go down in the annals of cryptozoology...

and if it means spending some extra time with Alexys then he's not one to argue. But Alexys and Nic are about to discover why the Appalachian Mountains are the last place you want to find yourself after dark…