This is an interesting dystopian storie. In am undefined future big cities like New York have been closed because they are inhabitable due to air pollution and overpopulation. Now they are a summer holiday attraction. But what happens when the doors close at the end of the summer? Something the 16 year okd Ron is going to find out the hard way.
Definitely a dystopian future that‘s not so far in the future anymore. The story was published in 1978.