The Nocturnals Series is a children's book series written by Tracey Hecht. It features a trio of animal friends: Batsy, a bat; Tilly, a hedgehog; and Gus, a sugar glider. Together, they embark on various adventures in their nighttime world, teaching young readers about friendship, teamwork, and problem-solving. The series is designed for early readers and combines engaging storytelling with colorful illustrations. Each book addresses themes such as bravery, empathy, and understanding differences, making it both entertaining and educational for children. The Nocturnals Series has received positive reviews for its relatable characters and valuable life lessons.