Final answer:
Trevor's preferred book genre growing up is not provided in the reference information, which covers several genres including science fiction and mystery, along with others.
Step-by-step explanation:
The type of books that Trevor enjoyed growing up is not specified in the information provided, which includes various genres such as science fiction, mystery, romance, and comics. However, it's mentioned that science fiction can captivate interests in subjects like astronomy, as it did for Carl Sagan. Science fiction often includes elements such as hard science fiction, apocalyptic worlds, dystopian societies, time-travel, space exploration, and first contact.
The mystery genre encompasses works by authors like Edgar Allen Poe and Mary Shelley, which feature elements like monsters, occult forces, and magic, and can also include gothic tales with supernatural events in dream-like settings, such as abandoned castles with ghosts and vampires.