What is the author's style in The Unbearable Lightness of Being by Milan Kundera?

One of the most interesting devices that Kundera uses in The Unbearable Lightness of Being is his creation of a narrator. When the book opens, the reader encounters a meditation on the ideas of German philosopher Friedrich Nietzsche and classical Greek philosopher Parmenides. What soon becomes clear is that there is a narrative voice undertaking this meditation, a voice that is creating and participating in the story while remaining somehow outside the story: "Not long ago, I caught myself experiencing a most incredible sensation. Leafing through a book on Hitler, I was touched by some of his portraits: they reminded me of my childhood.