Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great reference!

I am currently using this book for a Christian History college class and am finding it a very valuable resource!! This dictionary is full of short explanations of people, places, councils, religions, movements, and terms related to Christianity and Christian history. I appreciate being able to find exactly what I need in the short summary for each entry. This is a great resource I will be keeping for my reference!