Yes. Continue with #12.
No. You can reach out to publishers and editors without an agent, but you must do the work of an agent, including learning what’s involved in writing a query letter. Research agents to find those who handle the type of book you’re writing. Follow the guidelines for what the agent wants in, or with, a query letter. Have a lawyer review any proposed contracts with agents. Other resources to consider follow.
*From Jane Friedman, How to find a literary agent for your book.
*From Writer’s Digest, How to find a literary agent: finding agents appropriate for your writing.
*From The Write Life, How to find a literary agent: a comprehensive guide for aspiring authors.