James Cairns & Alan Sears 
Good Book, In Theory [PDF ebook] 
Making Sense Through Inquiry, Third Edition

This highly original and compelling book offers an introduction to the art and science of social inquiry, including the theoretical and methodological frameworks that support that inquiry. The new edition offers coverage of post-modernism and Indigenous ways of knowing, as well as a discussion of the research process and how to communicate arguments effectively. The result is a book that blends the best of earlier editions with updates that provide a strong foundation in critical thinking, rooted in the social sciences but relevant across disciplines.