Published in 1988, Calling of an Angel was the first well written book on Rene Caisse and essiac tea. The author, Dr. Gary Glum was the first person to reveal Rene Caisse’s essiac formula to the public. The book is now out of print but you can read it by clicking the link below.
“This is the story of a woman named Rene Caisse. For more than 50 years, until her death in 1978 at the age of 90, she treated thousands of cancer patients, most of them
written off by doctors as terminally ill, with her own secret herbal formula. She called it Essiac—Caisse spelled backwards—and she brewed the tea herself, alone in her kitchen.”