Hyewon Yum is a prolific picture-book creator, both as a solo author-illustrator and as an illustrator of books written by other authors (including one Boston Globe–Horn Book Honor Book!). In A Spoonful of the Sea (Norton, 4–8 years), which she both wrote and illustrated, the main character’s “birthday soup is seaweed soup” or miyeok-guk — and she learns how the soup connects her to the haenyeo, women divers, who came before her.