We're in a heyday for science fiction and fantasy on screen, whether it's the big screen or the small. Some of the most popular series out there take advantage of the in-depth world and character building of book series to populate their vivid worlds. Ernie Cline (author of Ready Player One, soon to be adapted for the screen by Steven Spielberg), Melissa de la Cruz (author of Witches of East End, Lifetime show by the same name), Andy Weir (author of The Martian, a Ridley Scott-directed adaptation will be released later this year), Daniel Abraham and Ty Franck (as James S. A. Corey, author of Leviathan Wakes, on which the upcoming Syfy show The Expanse is based), Lev Grossman (author of The Magicians, soon to be a Syfy show), and Christina Hobbs and Lauren Billings (as Christina Lauren, author of Beautiful Bastard, which has been optioned by Constantin Film) discuss how their creations are coming to life on screen.