Simplify the following text for a Grade 8 native English-speaking person.
Original: Most such sites are small , ephemeral , and\/or very narrowly focused , though sites like SF Site offer a broad range of references and reviews about science fiction .
Simplified: Most of these websites are small , ephemeral , or about very specific topics . Though sites like SF Site and Read and Find Out give readers a broad range of references and reviews about science fiction .