This doctoral essay consists of an annotated bibliography and performance guide of the entire body of Andrés Alén’s solo piano music. Written by one of his former pupils, this document provides the reader with a descriptive summary of each one of Alén’s works regarding tempo markings, meter, form, and keys. In addition, the author provides valuable insights on the pieces’ styles, historical background and recording information. The author includes, as an appendix to this essay, the score of his own alternate closing section (montuno) for Alén’s most famous work, Danzón “Legrand”. The biography of the composer is provided in this essay as well.