The book uses well-known franchises such as Game of Thrones, Vikings, Star Wars, The Lord of the Rings, The Hunger Games, Outlander, Once Upon a Time, and Westworld, as well as video games like Zelda and Assassin's Creed, as source material. It also offers additional background information, including introductions to the historical or cinematic context of the characters, insider stories from stylists and actors, and small boxes with specific historical facts about the hairstyles.