This book suffered from three weaknesses, the first of which may be idiosyncratic. 1. A "reader," I presumed, would be an introduction to Acquinas, one I could read without attending a class. Not so. This book assumed a lot of familiarity with Acquinas's terminology and intellectual heritage. 2. The book is organized by topics, with brief excerpts from Thomas's works yanked out of context to fit the editor's topic selection. A sequential selection from Thomas's principal writings would have better preserved the integrity of the works and allowed the reader better to follow Thomas's reasoning. 3. Finally, the editor needed an editor. Her writing is cumbersome. She seems to have forgotten how to write a simple declarative sentence.
I find Moses Maimonides no more approachable than Thomas Acquinas, but Isadore Twersky's "A Maimonides Reader" is far more approachable than Mary Clark's Acquinas reader.