Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Entertaining History

I knew little of xerography and absolutely nothing of Chester Carlson before reading this book and am surprised at how engaging I found it. Very glad that I read it.It's a very polished journalistic sort writing: careful, detailed, trusthworthy but also a spirited and easy book to read. I read it in one afternoon. It's not exceptionally thoughtful and there's not much here beyond the good story, but it is a very good story, well researched and well told.