This is a formidable biography of one of the most emblematic pianists in history, Glenn Gould, and the "dynamic duo" that accompanied him: his tuner, the almost blind and synesthetic Vern Edquist, and his piano, CD318, to which the Canadian dedicated a millimetric and obsessive search, not without arguing with Equist, for the perfect sound. Gloud, an artist who renounced the concert format and dedicated himself to making recordings that became fundamental, had a fascinating relationship with his piano. Behind a great pianist there is a great tuner, rea the phrase. Set against the historical backdrop of the 20th century, here we trace the history of Steinway & Sons, which had to make coffins during the Depression. This book is also the biography of a piano. This book, polyphonic in many ways, brings together disciplines, anecdotes and traces history through them while reflecting on the tension between the artist and fear and embracing the ghost of the harpsichord. Katie Hafner's research is fantastic.