Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Time Travel Book for Baseball Lovers

Is this science fiction? It is science fiction in that If I Never Get Back is a time travel book like you have never read before. This book takes Sam Fowler from modern San Francisco back to the early days of baseball (post-Civil War) and the newly formed Cincinnati Red Stockings. What makes this book so interesting is the description of how baseball was played in 1869 - so different than what it is today even as to the way pitchers pitched.Sam Fowler begins riding the rails with the fledgling Cincinnati Red Stockings and their trip around the U.S. to play other early baseball teams. It also goes into the atmosphere of the time, as in the description when the team played in New York City in a park that now is no more in these modern times.Ah, but then it is also a love story. But is it unrequited love? Is it a lost love? And does Sam ever find her again?Great baseball book and would make a great movie also.