Johannes Fiebig is one of the most successful authors in the field of Tarot and a leading expert in the psychological interpretation of symbols. He published his first book in 1984. Since then, his books have sold over 2 million copies, appearing in more than a dozen languages. In 1989, he co-founded and co-owned Königsfurt publishing house, which later became the publishing houses Königsfurt-Urania and AGM-Urania, of which he was managing director until 2018. Since then, he has been an independent writer based in Kiel.

Mary K. Greer is one of the world’s leading Tarot scholars and experts, famous by her outstanding, both exciting and useful Tarot blog at http://marykgreer.com. She is an author, teacher, and professional tarot consultant known for her innovative teaching techniques. With an M.A. in English Literature, she taught Tarot in colleges for fifteen years. Since the 1980s and her book Tarot for Your Self (1984), Mary belongs to the pioneers of the tarot as self-experience and as a tool of personal transformation and empowerment. She is a co-author of Pamela Colman Smith: The Untold Story (2018). She lives in California, USA.

Rachel Pollack is the author of 46 books, including two award-winning novels, a book of poetry, a translation, with scholar David Vine, of the ancient Greek play Oedipus Rex (2012), and a series of books about Tarot known around the world. Her first book, Seventy-Eight Degrees Of Wisdom, was published in 1980 and has been in print ever since. Her work has been translated into 15 languages, and she has taught and lectured on four continents. She also is a visible artist, creator of The Shining Tribe Tarot, and has collaborated with artist Robert M. Place to create the Raziel Tarot, and the Burning Serpent Oracle. She lived in Rhinebeck, New York, USA, for many years, where she died in 2023.

R. A. Gilbert is a retired antiquarian bookseller and a prolific author and editor in the field of Western Esotericism, specialising in the life and work of A. E. Waite and in the history and lives of members of the Hermetic Order of the Golden Dawn. His books include A.E. Waite: Magician of Many Parts (1987); The Golden Dawn Scrapbook (1997); Gnosticism and Gnosis (2012). Gilbert read Philosophy and Psychology at the University of Bristol, and received his doctorate from the University of London for a thesis on the publication of esoteric literature in the Victorian era. He lives a Somerset village, England.