Tuan is a geographer who was very important in putting the concept of place on the geographical map. What is remarkable about this is that it had to be done at all. Geography was a science which focussed on spatial relations of various sorts, but it had tended to deal with more "objective" aspects of space such as region and the ways human activities could be correlated with different kinds of geography. The human experience of being in a place was largely ignored.
Tuan had written an earlier book called Topophilia: A Study of Environmental Perception, Attitudes, and Values (Prentice Hall, 1974). This book dealt more with environmental psychology, or the ways in which out attitudes and actions are affected by our environment.