The best platform depends on your book's genre and target audience. Display ads work well for self-help, religion, politics, cooking, philosophy, medicine, and body/mind/spirit books. Facebook/Instagram ads are ideal for children's literature, romance, fantasy, historical fiction, science fiction, and young adult books. LinkedIn ads are best for books targeting educators, business professionals, specific industries, or professional development. BookBaby can help you determine the most effective platform for your specific book.