The book details the relationship of the person with the belief and the opinion they believe in; throughout nine chapters, the author raises questions that are revealed with attempts to answer them; clarifies the differences between opinions and beliefs on one hand, and knowledge on the other hand, in addition to explaining the mechanisms and manifestations of influence by opinion and belief, whether from the psychological impact or the expected pleasure. Specifications: - Author: Gustave Le Bon - Number of pages: 232 - Dimensions: 14x20 cm - Cover: reinforced middle (flexi) - Publisher: Rawai Books for Publishing and Distribution 2025