Tick Tock

''A slice of scary, escapist fun'' Observer
''The twists and turns are never-ending'' Daily Mail
''An unnervingly plausible and scintillatingly paced thriller'' Radio Times
''A phenomenal thriller, meticulously plotted and brilliantly realised'' Clare Mackintosh, Books of the Year
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If you can hear it, your time is running out.

Teacher Kit Chaplin can''t understand why some...