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The Last Equation of Isaac Severy: A Novel in Clues

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*One of The Wall Street Journal’s “25 Best Mystery Novels of the Last 25 Years”

*Edgar Award Nominee

A “hugely entertaining” (The Wall Street Journal) mystery starring “a Royal Tenenbaums-esque clan of geniuses” (Martha Stewart Living)—perfect for fans of Richard Osman and Janice Hallett.


Days after the death of her adoptive grandfather, the mathematician Isaac Severy, Hazel Severy receives a letter. In this puzzling missive, Isaac alludes to a secretive organization that is after his final ...