Peter Hunt’s world of mathematical abstractions is no shield from a rapidly approaching dystopia. When his physics professor, brilliant maverick Stephen Daniels, says the wrong thing at a Clusion workshop, the malevolent ‘Project’ organisation comes to see both master and student as a threat to be neutralised.

 

As the net tightens, Peter draws hope from extraordinary and beautiful historian, Cassie Walters. But in reality there can be only one escape – a journey back through time. The Shadow Guide, a dark, mysteriously protective time machine, is their doorway to a half-forgotten age of glamour, inequality and heady optimism.

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Can the past be changed and a better present built? The quest for an answer opens a Pandora’s Box of scientific and historical paradoxes – and hints of a fundamental force underlying the entire universe.