McNally's theatrical creation, Love! Valour! Compassion! (1994), emerged from a heartfelt desire to paint a vivid portrait of life as a gay man in America during the 1990s. The play was met with enthusiastic applause from critics and garnered numerous accolades, including the prestigious Tony Award for best play.

The work Greek Fire: The Story of Maria Callas and Aristotle Onassis (2001), authored by Nicholas Gage, offers a compassionate chronicle of the fiery nine-year romance between the legendary diva Callas and the powerful Greek magnate Onassis. A significant note for those studying Master Class is Gage's controversial assertion that Callas bore Onassis’s son in 1960, though tragically, the child passed away shortly after birth.

In Maria Callas: An Intimate Biography (2001), Anne Edwards pens the latest in a long line of over thirty biographies dedicated to Callas. With meticulous research, Edwards seeks to unravel the truth from the web of myths surrounding Callas's life, presenting evidence to challenge Gage's claims in Greek Fire regarding Callas’s alleged child with Onassis. Alongside the enthralling saga of Callas’s life, Edwards enriches her narrative with detailed accounts of opera plotlines, costumes, and set designs.

Diva: Great Sopranos and Mezzos Discuss Their Art (1991), crafted by Helena Matheopoulos, delves into the world of twenty-six renowned female opera singers. These divas eloquently share insights into their vocal evolution, the signature roles that define their careers, and glimpses into their personal lives, offering pearls of wisdom to aspiring young singers.