This document outlines the structure and content of a book on theoretical perspectives of social machines. It discusses various views of social machines, including the mechanistic view which focuses on socio-technical mechanisms. It also examines how different views like the content creation view and extended systems view can co-exist under a relaxed pluralism. The conclusion advocates seeing social machines as systems realized by socio-technical mechanisms and as socially situated machines. The document lists several publications by the author on related topics of social machines and machine intelligence.