Black-footed Ferrets

Back from the Brink

2007

How Many People Traveled the Oregon Trail?

And Other Questions about the Trail West

2012

Merciless Monarchs and Ruthless Royalty

2012

Saving Animals from Volcanoes

2011

The Ant's Nest

A Huge, Underground City

2009

The Prairie Dog's Town

A Perfect Hideaway

2009