The story “The Key to the City of Antonovsk” tells how much can be changed if you fight to the end. An environmental threat looms over the city, which adults are unable to resist. And then the children rise to defend their native Antonovsk. Each of the guys, in addition to protecting the town, also has their own personal, no less important problems. But friendship, mutual assistance and good old books will help you cope with all these difficulties. The story received third prize at the fourth Sergei Mikhalkov Competition in 2014. For middle school age.