When Carl stared out the window, he had many questions.

Astronomer and scientist Carl Sagan loved asking questions--he wanted to learn about everything from the smallest atoms to the vastness of the galaxy. And by using his imagination and allowing himself to dream up questions big and small, he inspired others to keep exploring the mysteries of the universe and our place in it.

Geisel Award-winning author and illustrator James Yang invites readers on a fantastic journey through the cosmos, inspired by the life and work of Carl Sagan.