Helen Nicholson is Reader in History, Cardiff University.

Nicholson discusses the many different types of crusades, including not only the expeditions to the Holy Land, but also those against heretics and pagans in Europe; the reconquest of Spain from the Muslims; and crusades against the Turks in the Balkans. She also discusses the different schools of thought among historians as to how to define crusades and why medieval Christians went on them. . . . The appended biographies and glossary are well done, but even more useful are the relevant primary documents conveniently included. -- School Library Journal