If you know writers who write for either adults or children who need something more advanced, try Advanced Plotting. The paperback is only $9.99, Kindle is $4.99, or you can read it for free if you have a Kindle Unlimited subscription.
Chris Eboch is the author of over 60 books for children, including nonfiction and fiction, early reader through teen. Her novels for ages nine and up include The Eyes of Pharaoh, a mystery in ancient Egypt; The Well of Sacrifice, a Mayan adventure used in many schools; The Genie’s Gift, a middle eastern fantasy; and the Haunted series, about kids who travel with a ghost hunter TV show, which starts with The Ghost on the Stairs. Chris also writes for adults under the name Kris Bock.
Learn more at chriseboch.com