It is one of several books I have read which portray an alternative Prague existing alongside the "real" Prague. I have reviewed some of them on my Magic Realism Books blog: including A Kingdom of Souls by Daniela Hodrova, Keeping Bedlam at Bay in The Prague Cafe by M Henderson Ellis, Gustav Meyrink's works including of course The Golem and of course Kafka's The Metamorphosis. And there are more such books on my to-be-read list.
I am not surprised that Prague has almost spawned a sub-genre of place-based magic realism. During my first visit to the city, only a few months after the Velvet Revolution, I was acutely aware of the magical or spiritual energy that seemed to flow out of Prague's ancient stones, rippling across the Vltava and climbing the steps to the castle and Emperor Rudolf's alchemical workshops. That magical echo is less audible now beneath the footsteps of eager tourists and the kerching of cash registers, but it is still there.
The Other City is set in a Czech winter, a time of year when I have always felt the Prague magic most acutely. Maybe it is because of the way the snow deadens sound and redraws the familier outlines of buildings, smudging the boundaries between water, land and sky. Ajvaz's Other City also emerges at night, something that is hard to imagine in the real city busy 24/7.
The alternative Prague that Ajvaz creates is too fantastical for my liking, closer to surrealism than magic realism. The author obviously had great fun inventing an amazing alternative world and mixing it in with the real Prague - "Customers at Cafe Slavia are seldom assaulted by sharks". I particularly loved the idea of the bases of the statues on Charles Bridge being used as stalls for tiny elks, but at times the weirdness just went on too long. I am perhaps too Anglo Saxon to appreciate this very Czech absurdism. By the way there are some great jokes about the Czech language in the book; "Case endings were originally invocations of demons." For this failed student of Czech, they still are!
It is hard at times, as the novel's central character pursues the Other City and is at times pursued by it's inhabitants, to see where the novel is going. But there is a resolution - a philosophical one, which comes to the central character in the last chapter. Ajvaz is a researcher at the Prague Centre for Theoretical Studies and has published not only a book on Borges but also one called Jungle of Light: Meditations on Seeing and in many ways this book is also a meditation on seeing. I will say no more for fear of spoiling the book for you.