What makes your book special?
My book has, among others, the "Dark Fantasy" tag.
It is not necessarily dark in the beginning, save a few charred corpses and monsters. However, it is meant to grow darker and darker along the way, growing with the reader as they get invested in the story and it's characters.
My inspiration for this, weirdly enough, was Adventure Time. Whimsical naïveté, with a dark and terrifying looming behind everything.