You should provide detail, but not a crazy amount. Book Engine can write a book with something as simple as 'Harry Potter invents the iPhone for wizards' But it would be better to provide something like 'Marcus Blackwood, a brilliant seventh-year wizard student, bridges the magical and non-magical worlds by inventing the SpellScreen - a revolutionary device that combines enchanted moonstone displays with runic processing arrays. Despite skepticism from traditionalist professors, he develops a magical network using ley lines as power sources, allowing wizards to instantly share messages, memories, and conduct face-to-face conversations across distances. When a crisis hits the magical world and conventional communication methods fail, Marcus's invention proves crucial in coordinating the response. Though older wizards still prefer their owls, the SpellScreen becomes widely adopted, especially helping young wizards from non-magical families stay connected to both worlds. Marcus goes on to establish a magical technology research institute, showing how innovation and tradition can coexist in the magical realm.' You could also provide a large amount of detail but Book Engine will probably strip quite a bit of detail, so we don't recommend that. We are working on improving this.