In “Spiritualism and the New Psychology,” Millais Culpin navigates the intricate intersection of spiritual beliefs and emerging psychological theories in the early 20th century. Culpin employs an analytical yet accessible literary style, delving into how spiritualism—once a countercultural phenomenon—intersects with the scientific explorations of the mind, particularly the nascent field of psychology. This work is imbued with a rigor that reflects the intellectual currents of its time, offering readers a rich contextual understanding of how spiritualism sought legitimacy alongside the developing psychological paradigms influenced by figures such as Freud and James. Culpin, an influential figure within progressive psychological circles, was deeply engaged with both the metaphysical inquiries of his time and the scientific community's evolving understanding of the human psyche. His background in psychology and spiritistic inquiry uniquely equipped him to explore spiritualism's assertions through a scientific lens. This confluence of interests underscores his objective to challenge the rigid materialism prevalent in psychological thought and advocate for a more integrative approach to understanding consciousness and experience. Readers keen on the evolution of psychological thought or the historical context of spiritual practices will find Culpin's work both enlightening and provocative. By synthesizing diverse elements of spiritualism and psychology, this text invites a deeper contemplation of human consciousness, making it a significant read for scholars and enthusiasts alike.