Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Buy it for "Gulf"

"Gulf" is a short novel gem, and a slightly sideways-in-time prequel to "Friday." Witten during the period when Heinlein was writing books like "The Puppet Masters" (which it has similarities to), and "The Door Into Summer", it's a good story, well told."Jerry Was a Man" is a lesser work, but interesting in that it argues that humanity will constantly have to revisit the slavery thing as our abilities to create non-human servants will outstrip our wisdom in their use. Maybe old hat now, but it wasn't in the 1940's. I'd be willing to be large sums that whoever wrote the Star Trek:TNG story about Data being, leagally, a Man, had read this once apon a time. Very similar viewpoints.The other two stories are among Heinlein's poorest and keep this from being a 5.