Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An Excellent Collection of Introductory Essays!

This book is a treasure. The book chapters introduce many of the leading lights of the middle ages, as well as some who are less well known. The chapters are written by leading experts, and are accurate and insightful. Marcia Colish provides, for example, in her chapter on Peter Lombard, the best compact summary of the Sentences available in the English language. Other chapters I particularly liked included Jonathan Rist's on St. Augustine, Jenny Swanson on the Glossa Ordinaria, and Willimien Otten's survey of Carolingian theology. Great resource!