You can begin building goodwill with fellow authors by leaving supportive book reviews, explains bestselling author, TEDx Speaker, and special advisor Dr. Mark Goulston. A video review, on Amazon or elsewhere, stands out more than a written review and can leave a greater impact. When Dr. Goulston leaves a video review for a book he has genuinely enjoyed, he wants to make sure the author knows he understood his or her message and how the book affected him personally. It can also be helpful, Dr. Goulston explains, to point out specific pages or passages from the book that you enjoyed, to highlight what parts of the book resonated with you the most. Many authors will return the favor, giving your book a boost as well.