For nonfiction authors, establishing expertise in a subject should be a top priority before submitting a book proposal to an agent or publisher. If you’re having trouble solidifying your credentials and platform, literary agent and book development consultant Claire Gerus has suggestions to expedite the process. She uses an example of someone who has spent years researching an unusual device. This person has put a lot of time into becoming an expert, but he or she is employed in an unrelated field. While this could be a hindrance, Gerus suggests asking for an endorsement or written introduction for your book from someone who is already respected in the field. This will boost your credibility and trustworthiness when submitting a book proposal.
Thank you for this great idea.