"The Nonsense Called Theosophy" Joseph McCabe, 1927 (No. 477 - Little Blue Book)
 
Joseph McCabe offers a critical examination of theosophical doctrine, challenging its philosophical foundations and exposing its contradictions. The book points out key topics such as mysticism, spirituality, and the interplay between religion and pseudoscience, delivering a rigorous analysis that questions the legitimacy of theosophy as a coherent belief system. The work reflects early 20th-century skepticism but also enriches the understanding of esoteric movements in modern history.