A Cambridge historian Elizabeth Vogelsang is found drowned clutching a glass prism in her hand The book she was writing about Isaac Newtons involvement with alchemythe culmination of her lifelong obsession with the seventeenth centuryremains unfinished When her son Cameron asks his former lover Lydia Brooke to ghostwrite the missing final chapters of his mothers book Lydia agrees and moves into Elizabeths housea studio in an orchard where the light moves restlessly across the walls Soon Lydia discovers that the shadow of violence that has fallen across present-day Cambridge which escalates to a series of murders may have its origins in the troubling evidence that Elizabeths research has unearthed As Lydia becomes ensnared in a dangerous conspiracy that reawakens ghosts of the past the seventeenth century slowly seeps into the twenty-first with the city of Cambridge the bridge between themFilled with evocative descriptions of Cambridge past and present Ghostwalk centers around a real historical mystery that Rebecca Stott has uncovered involving Newtons alchemy In it time and relationships are entangledthe present with the seventeenth century and figures from the past with the love-torn twenty-first-century woman who is trying to discover their secretsA stunningly original display of scholarship and imagination and a gripping story of desire and obsession Ghostwalk is a rare debut that will change the way most of us think about scientific innovation the force of history and time itself.