What is the topic?

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Across
  1. 3. The history of a real person written by someone else
  2. 5. Stories of Cinderella, Little Red Riding Hood, Snowwhite and so on-2 words
  3. 7. A genre of "Romeo and Juliet"
  4. 8. Lasers and time-travel are not unusual in this kind of book - 2 words
Down
  1. 1. A genre in which monsters and zombies are common
  2. 2. Writer famous for creating "whodunits" (detective)stories - 2 words
  3. 4. There are lots of dragons and magic
  4. 6. Stories that are untrue/imagined