In On a Lark to the Planets Montgomery likely tells a whimsical and imaginative story about a group of children who embark on a fantastical journey to explore the planets of the solar system. The title suggests a lighthearted and adventurous tale filled with excitement and discovery. Montgomery's novel is likely to be filled with themes of exploration friendship and the wonders of the universe. Through the eyes of the young protagonists readers may encounter imaginative depictions of distant worlds and encounters with alien beings as well as lessons about curiosity bravery and the importance of working together.