The story hook is what draws your reader into the story. It's the intricate tidbit that makes them go, I need to read that. It grabs the reader's attention. You'll want a unique twist to your story, so that it stands out. First you need your reader to want to pick up the book and read it. Once they're there, you want them to keep turning the pages. You'll want a hook directly in the beginning, so they'll need to know what happens.