The brand new novella in the Sunday Times #1 bestselling Rivers of London series.

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THEY DO THINGS DIFFERENTLY ACROSS THE POND…

When ex-FBI Agent Patrick Henderson calls in an ‘X-Ray Sierra India’ incident, the operator doesn’t understand. He tells them to pass it up the chain till someone does.

That person is FBI Special Agent Kimberley Reynolds. Arriving snowbound Northern Wisconsin, she finds that a tornado has flattened half the town – and there’s no sign of Henderson.

Things soon go from weird to worse, as neighbours report unsettling sightings, key evidence goes missing, and the snow keeps rising – cutting off the town, with no way in or out…

As the clues lead to the coldest of cold cases – a cursed expedition into the frozen wilderness – Reynolds follows a trail from the start of the American nightmare, to the horror that still lives on today…

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PRAISE FOR BEN AARONOVITCH & THE NUMBER ONE BESTSELLING RIVERS OF LONDON SERIES:

‘Highly entertaining’ SUNDAY EXPRESS

‘Charming, witty, exciting’ THE INDEPENDENT

‘Ben Aaronovitch has created a wonderful world full of mystery, magic and fantastic characters’ NICK FROST

‘Funny and wildly inventive’ MAIL ON SUNDAY