Publishing a book is only half the journey—effective marketing ensures it reaches the right readers. The best book marketing services in 2025 offer a mix of digital strategies, including Amazon optimization, social media campaigns, email marketing, book reviews outreach, and PR placements. Premium providers may also include author branding, book trailers, and advertising on platforms like Facebook, Instagram, and BookBub. Trusted names such as Smith Publicity, BookBaby, and BookBub’s Featured Deals remain industry favorites, while platforms like Reedsy connect authors with vetted marketing professionals. A solid marketing service can significantly boost visibility, sales, and long-term author brand growth.