Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not a masterpiece, but fun!

A friend of mine, John Long (the famous climber), recommended this book to me. I actually really liked it, and as far as sci-fi goes this was a fun book with an interesting premise, quirky-acting characters, and a mostly unpredictable plot. Best of all, the story involved the pleasant twists one would expect from a good story about time travel. I generally don't comment on other's reviews, but one reviewer noted somewhat oddly that the story's characters could not likely have covered as much ground during their travels as portrayed in the story, and I will second on this slightly odd observation. Summary: Read it if you enjoy time travel stories. Lastly, be sure to check out "Venus on the Half Shell", my favorite by this same author.