From Joseph Kuefler, the acclaimed author-illustrator of The Digger and the Flower, comes a new book in his popular Digger picture book series, about a crew of building trucks who befriend a caterpillar and witness its metamorphosis into a beautiful butterfly. Perfect for readers who love the machines in Sherri Duskey Rinker's Construction Site series.

Digger and the other big trucks work all day, smashing and building and transforming their jobsite.

But when a caterpillar weaves its cocoon onto Digger's bucket, he is forced to stop and be still.

In the stillness, Digger begins to notice the world beyond his worksite. And when the butterfly finally emerges, it's clear that Digger and his friends have also been changed forever.

The story includes an accessible guide to metamorphosis for young readers.