Under the Ice, Rachael Blok’s “twisty, atmospheric and haunting” (Erin Kelly) debut thriller, is available on Amazon Kindle for only 99p this November and December as part of Head of Zeus’s special ‘Christmas Kills’ e-book promotion. Grab the e-book here now.

It is the week before Christmas and the cathedral city of St Albans is blanketed by snow. But beneath the festive lights, darkness is stirring. The frozen body of a young girl is discovered by the ice-covered lake.

The police scramble for clues. A local woman, Jenny, has had visions of what happened the night of the murder. But Jenny is an exhausted new mother, whose midnight wanderings pull her ever closer to the lake. Can Jenny be trusted? What does she really know?

Then another girl goes missing, and the community unravels. Neighbour turns against neighbour, and Jenny has no idea who to believe. As Christmas Eve approaches, Jenny discovers a secret about her past – and why she could be key to everything…

Under the Ice is the twisty debut psychological thriller from highly acclaimed author Rachael Blok.

Follow Rachael on Twitter @MsRachaelBlok.