23 books • 9 series
Top 10 American Women Sprinters (Sports Top 10)
La Salle (Explorers!)
Vasco Nunez de Balboa (Explorers!)
Christopher Columbus (Explorers!)
Ferdinand Magellan (Explorers!)
Airplanes (Transportation and Communication)
Trucks and Big Rigs (Transportation and Communication)
Henry Hudson (Explorers!)
Lewis and Clark (Explorers!)
Hernan Cortes (Explorers!)
Ponce de Leon (Explorers!)
Ships and Boats (Transportation and Communication)
Highways and Freeways (Transportation and Communication)
Police and Emergency Vehicles (Transportation and Communication)
Randy Moss (Sports Heroes)
Mankind (Pro Wrestlers)
Kevin Garnett (Sports Heroes (Capstone))
Fire Engines (Transportation and Communication)
Sammy Sosa (Sports Heroes) (Sports Heroes (Capstone))
Extreme Sports (Extreme Sports)
The San Francisco 49ers Football Team (Great Sports Teams)
Extreme Mountain Biking (Extreme Sports)
The Green Bay Packers Football Team (Great Sports Teams)