 Zajdel's early works, from 60s and early 70s, can be located in the Cambellian, classic science fiction genre, focusing on scientific inventions and their role in space exploration, alien contact or artificial intelligence. As his writing career continued, however, his stories evolved to focus on the social aspects and often negative consequences of those inventions. Over time, an increasingly visible theme became visible in his works - a concern over dangers inherent in attempts to control the human society. He is also condemning human ignorance, warning against xenophobia, and asking philosophical questions about the nature of the universe, happiness and human destiny. Zajdel's most important works are from his second period - late 70s and 80s - and represent the genres of social and dystopian fiction. In his works, he envisions totalitarian states and societies leaving under extreme forms of mass surveillance.
