How Do I Write a Children’s Book Proposal Cover Letter? Home › Forums › Writer’s Digest Forum › Introductions › How Do I Write a Children’s Book Proposal Cover Letter? This topic contains 1 reply, has 2 voices, and was last updated by AngelinaK52 3 months, 2 weeks ago. Author Posts June 3, 2018 at 8:15 pm #347015 SNielsenParticipant Hey, I’m Mary and I was wondering how to write a really good Children’s book proposal cover letter? Any samples? I am new to writing and have researched and bought books on how to write a query letter, manuscript, and proposal. However I can’t figure out how to do the cover letter the correct way. Any help for the children’s book proposal too would help so that I know I did it right. Thank you! June 4, 2018 at 7:22 pm #656057 AngelinaK52Participant Welcome to the forums. Author Posts You must be logged in to reply to this topic.