Musicians and photographers are listed in a perpetual calendar that provides an opportunity to celebrate their birthdays or commemorate their deathdays. A major part of the book is comprised of 12 interviews conducted by Karl Lippegaus selected from almost 200 interviews, the priority being to present the most diverse musical characters whose personal data could be integrated in the structure of the calendar. Apart from the conversation with Henri Texier and Michel Portal, which were conducted in French, all the interviews in this book are published in the original English.