This study presents pertinent information for singers and teachers of singers about selected vocal works written by three significant composers who were active during the first half of the twentieth century: Arnold Schoenberg, Anton Webern, and Alban Berg, also referred to as The Second Viennese School. The vocal works of these composers are often neglected due to the assumption that the works will be atonal and, therefore, musically unachievable for performers and unsatisfying for audiences. For each composer, information about his educational background and compositional style is provided, in addition to commentary on representative vocal works supported by musical examples. A significant part of this research includes interviews with renowned singers who supply advice for practice and performance-related suggestions. In order for singers and teachers to obtain essential information regarding these solo vocal works, a complete catalog is provided.