Written by Christian Bök ‘Eunoia’ is an avant-garde work that pushes the boundaries of language. Bök starts an ambitious exercise in univocalics, where each chapter uses only one vowel. The main section of the book consists of five chapters: ‘A,’ ‘E,’ ‘I,’ ‘O,’ and ‘U.’ Each chapter baseis on a specific vowel, and the rules for each are intriguing: