When my mom died in 2003, she left behind dozens of drawings and paintings. She worked as a children’s librarian, and most of her artwork could have lived in a picture book. Not the cutesy kind, but the kind that winks at other worlds. With pen and ink and colored pencil, she summoned wit and whimsy and shadow. Trina Schart Hyman, who captured the beauty and darkness of fairy tales, was one of her favorite illustrators.