Instruct: Classify the given Amazon review as either positive or negative.
Query: Hard to read

I had this for a topics class in college. The book had great articles, written by many scholars. However, there was no common bond pulling the book together. No overall theme, and each article was painstakingly hard to comprehend. Works better when supplemented with knowledge of the collapse event before reading the article. In that it fails as a stand alone book. Maybe it could have had an overview of the chapter topic or civilization, before outlining specific theory.