"The Comte de St. Germain" by Isabel Cooper-Oakley is a biographical work that delves into the life and mysterious persona of the enigmatic figure known as the Comte de St. Germain. The Comte de St. Germain was a prominent character in European history during the 18th century, known for his extraordinary abilities, vast knowledge, and alleged immortality. The book explores the life of the Comte de St. Germain, tracing his origins, his interactions with influential figures of his time, and his involvement in political and social circles across Europe. Isabel Cooper-Oakley offers a comprehensive examination of the Comte de St. Germain's life, drawing from historical records, eyewitness testimonies, and anecdotal evidence. She explores the mysteries and controversies surrounding his identity, his purported longevity, and his involvement in various historical events.

Harriet Isabella Cooper-Oakley(1854–1914), was a prominent Theosophist and author.