How Do You Write A Query Letter To An Agent . To finish your query letter, thank the agent for their time, then use a suitable sign off (e.g., “kind regards” or “sincerely yours”). Here are 38 query letter tips from literary agents to help writers know how to write a query letter that will find more success with agents and editors. Tips on what’s important and what to do before sending your query from www.pinterest.com The goal here is not to kiss up or stroke the agent’s ego. 4—show you know who your readers are. The purpose of a hook is to persuade the recipient to continue reading your letter.