This book which we will introduce and evaluate has been prepared in such a way which discusses religion and religionism in various contents and with different variables and which will describe the scope of the subjects at an adequate level by those who are expert in their field in each section. Many kinds of research related to the formation of personality and factors affecting the personality have been conducted in psychology history and theories have been developed in this context. While religion constitutes the primary motivation source of the life of people, it is also an establishment shaping the intrinsic impulses and behaviors of individuals. For this reason, researches are being carried out for investigating the role of religion in the formation of personality and what the impacts of religion are while shaping the personality. In the related researches, it is attempted to determine which differences the religious individuals exhibit in their personality traits compared to which less religious or non-religious individuals and whether they resemble the adjectives attributed to them or not. In the book, current subjects like disadvantageous individuals, traumatic incidents and mental health, and Covid-19 pandemic are being investigated in detail in the context of Psychology of Religion.