Instruct: Classify the given review as either positive or negative.
Query: A must buy

I have never been a big fan of JFK and I have found that many things remotely associated with him to be unnecessarily praised because he is a Kennedy, American royalty. However, I found the book "a must buy" for the two objectives JFK wanted to demonstrate:- The courage of individuals at key points in their careers who risked and usually lost everything for what they believed in- That politicians are forced in their careers to balance of the interests of their parties, their voters, their state, the nation, and their conscience. It is very hard to serve so many masters.The book increased my understanding of the difficulty of the political process.