What is the author's style in Signs of Life in the U.S.A. by Sonia Maasik?

The book is arranged with the beginning of each chapter containing an introduction and discussion by the authors Sonia Maasik and Jack Solomon. Both of these authors are academics who are involved in the development of critical thinking skills and writing skills in their students. They have gathered a selection of essays for each of the nine categories that they cover in the book.