[This book contributes to our understanding of a number of theories and models. The theoretical contribution of this book is that it analyzes and synthesizes the relevant literature in order to enhance knowledge of IS theories and models from various perspectives. To cater to the information needs of a diverse spectrum of readers, this book is structured into two volumes, with each volume further broken down into two sections.The first section of volume 2 concerns socio-psychological theories. These include personal construct theory, psychological ownership, transactive memory, language-action approach, and nine others. The second section of volume 2 deals with methodological theories, including critical realism, grounded theory, narrative inquiry, work system method, and four others., This book contributes to our understanding of a number of theories and models. The theoretical contribution of this book is that it analyzes and synthesizes the relevant literature in order to enhance knowledge of IS theories and models from various perspectives. To cater to the information needs of a diverse spectrum of readers, this book is structured into two volumes, with each volume further broken down into two sections.The first section of volume 2 concerns socio-psychological theories. These include personal construct theory, psychological ownership, transactive memory, language-action approach, and nine others. The second section of volume 2 deals with methodological theories, including critical realism, grounded theory, narrative inquiry, work system method, and four others.]