Spirit, Sun & Serenity — A Superhero Feelings Series for Emotional Intelligence & Mindfulness Spirit, Sun & Serenity is a heart-centered children’s book series designed to help young readers understand, express, and care for their emotions with confidence. Perfect for families, classrooms, and therapists, this series blends imaginative storytelling with powerful social‑emotional learning tools that support emotional intelligence in kids ages 4–10. Children explore a magical world where feelings create real energy — and three superhero girls step in to help whenever big emotions arise.