Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I felt like I needed to have prior knowledge of Jefferson.

I was a little disappointed with this biography. I never really got used to Randall's writing style. I think he expected the reader to come to the book with substantial prior knowledge of Colonial American history. This was the first book on Jefferson that I have read, but I think it would probably be more informative to a person who has already read several Jefferson biographies.