Complex sentence: These easily printed collections tended to focus on a particular genre of fiction, the first sustained science fiction specialized Pulp called "Amazing Stories" started publishing in 1926, Adam Roberts "Science Fiction".
Split into simpler sentences: These easily printed collections tended to focus on a particular genre of fiction. One of the first Pulp magazines specializing in science fiction was called "Amazing Stories" and started publishing in 1926, Adam Roberts "Science Fiction".