"How to Sing" by Luisa Tetrazzini is a guide on vocal training and techniques written in the early 20th century. The book offers insights and practical advice for aspiring singers, whether they pursue singing as a hobby or seek a professional career. Tetrazzini draws on her extensive experience in the operatic world to lay out essential principles for developing vocal talent. The opening of the book introduces Tetrazzini's motivation for writing it; she frequently receives letters from individuals seeking advice on how to cultivate their singing abilities. Expressing her belief that becoming a successful singer requires hard work and commitment, she emphasizes the importance of self-discovery in one's vocal journey. This section sets the tone for the subsequent chapters, where Tetrazzini discusses various aspects of singing, including the necessary training, qualities needed, and the significance of voice placement and breath control. Overall, her practical approach and wealth of experience promise valuable insights for singers at all levels. (This is an automatically generated summary.)