Friendship in Doubt weaves the key figures of the rationalist movement into its narrative, making skilful use of previously unexplored source material to bring these characters to life. The book is a masterful combination of scholarly insight and biographical storytelling.
Richard Kaczynski is an independent scholar of Western Esotericism, best known for the biography Perdurabo: The Life of Aleister Crowley (2010). He publishes and presents widely, including with the Association for the Study of Esotericism and Trans-States (for which he was a keynote speaker in 2016). As a statistician, he has held academic positions with the Wayne State University School of Medicine, University of Detroit Mercy School of Dentistry, and Yale University School of Medicine.