Grad obrechennyi - Strugatskie Arkadii i Boris

One of the most mysterious books of the Strugatsky brothers, the genre and purpose of which each reader defines for himself in his own way. A philosophical parable? A dystopia? A novel of growing up?
The main character, Andrey Voronin, gets to the City, where there is a universal right to a variety of work. He tries himself in different professions and finds himself in difficult, sometimes contradictory life situations. What is the purpose of the mysterious Urban Experiment, which collides with each other people pulled out of different time layers?
Or is it the case when the correct question is much more important than the answer?