This book traces Tay's life and career, from her debut, characterised by typical country sounds, to Midnights and the triumphant Eras Tour, with sold-out dates all over the world and millions of fans under her stage, crazy about her. The first ten albums are described and analysed here, track by track - 144 songs - in an unprecedented in-depth musical examination of her oeuvre. In parallel, the salient episodes of her life, both artistic and personal, made up of triumphs and fears, happy and dramatic relationships, collaborations and betrayals, which compose a well-rounded portrait of a true media, social, cultural and entrepreneurial phenomenon. The One.