Unitarianism by William George Tarrant is an important business textbook that explores the principles and practices of this religious movement. The author examines in detail the idea of Unitarianism, which is based on belief in one God, rejection of the triune God and support of individual freedom of thought in the spirit of tolerance. The book contains historical aspects of the development of Unitarianism, as well as important concepts and views that influenced this religious movement. With the author's clear writing and research, Unitarianism becomes an important source of information for those interested in thinking about the nature of God and religious belief.