Need help remembering book title

Basically it's a children's book with colored pencil like illustrations. The summary is there's an indigenous species that lives on a planet and mysterious invaders come and basically create an entire industry on their planet while the indigenous species hides underground. Eventually all of the natural resources are used up and the invaders leave and the indigenous species comes back to a husk of a planet.

Cannot for the life of me remember the name. Thanks for your help!