Engage readers on your Facebook page by providing useful, positive information and connecting on a personal level. Promote your book by regularly writing a short blog and sharing the link on Facebook, or by posting images and descriptions of your book. Use giveaways and raffles before or during your book launch to build buzz. Direct calls to action by asking fans to share, comment, or like posts, and by using immediacy language like "act now" to spread the word about your book or new Facebook page.