This book is a decent introduction to the ideology of the social sciences. It provides, as the author puts it, a scaffolding that permits a new researcher to understand their own frame of reference and the frame of reference of others in the social sciences. It is not complete by any means and needs to be supplemented with other texts, but it does deal in outline with the various claims made by different philosophical traditions. The book starts with positivism and uses it as a foil for the rest of the book. It covers in outline all the major movements you will find in contemporary social science.
Perhaps the most important elements you will learn from the book is that research in all traditions since philosophical pragmatism (Pierce, James, Dewey) and Marxism, which birthed the main paradigms, are implicitly or explicitly about affecting social change using research products. The book is strongest discussing paradigms from pragmatism and the Marxist legacy as interpreted in the Frankfurt School. It is weakest in discussing post-modernism.
Note: positivism, whether post-positivism, or not, gets a pretty bad rap in the book, which is probably true in some social science fields but not others. Positivism is utterly dead in anthropology, and there a huge division between behavioral and evolutionary/genetic psychologists and social psychologists. Positivism is still a dominant paradigm in political science in the United States, based on the number of quantitative papers published.