The Last Equation of Isaac Severy

A struggling bookseller and granddaughter of a renowned mathematician, Hazel receives a mysterious letter after her grandfather's death, revealing a secretive equation with potentially dangerous consequences. As she searches for her grandfather’s hidden work amidst a web of shadowy agents and family secrets, Hazel must unravel complex clues within a cherished novel to protect his final discovery. This literary mystery combines suspense with a nuanced look at family dynamics and intellectual legacy.