It has been pretty conclusively shown that material published by University presses is not uniformly "peer-reviewed". University presses tend to be high-quality publishers, but that does not imply "peer-review". The book itself is described in the New York Times book review as a "diary"; it contains Shulman's impressions, feelings, and thoughts over a period of time. It is not an actual academic study of the settlers, and Shulman's psychological analysis of them is his view as an activist, not as an expert.  (talk)