
2024
Tree, Wildflower, and Mushroom Spotting: The Definitive Interactive Nature Guide
2023
A True Tale from Yellowstone
2022
Animal Watching: The Definitive Interactive Nature Guide
2021
2021
Track, Spot & Provide Healthy Habitat for Creatures Close to Home
2020
Seeing Inside Severe Storms
2019
. . . and Other Tiger-ific Questions
2019
. . . and Other Shark-tastic Questions
2019
2019
The First Visit to an Ice Dwarf and the Kuiper Belt
2017
2016
Earth Science Under Glass
2015
And Other Questions About Women's Suffrage
2015
Ocean Adventure
2014
And Other Questions About Bugs and Insects
2014
Gila Monsters, Geysers, and Grizzly Bears in America's Own Backyard
2014
And Other Questions About Our Planet
2014
And Other Questions About Our Solar System
2014
2013
Exploring Galaxies, Black Holes, Alien Planets, and More; A History with 21 Activities
2013
And Other Questions About... Martin Luther King Jr.
2013
And Other Questions About…The American Revolution
2012
And Other Questions About The Titanic
2012
2012
2012
2012
2010
2010
2010
2010
2010
2010
2010
2010
2010
2010
2010
2010
2010
2007
From Slavery To Freedom With 21 Activities
2005
How They Invented the Airplane, 21 Activities Exploring the Science and History of Flight
2003
1998
His Life and Inventions, with 21 Activities
1994
And Other Questions About Weather
1860
1774
And Other Questions About the Underground Railroad
1678
1648