58 books • 26 series
Diggers (Mighty Machines) (Blastoff! Readers: Mighty Machines)
Wheel Loaders (Blastoff! Readers: Mighty Machines) (Mighty Machines)
Bucket Trucks (Mighty Machines)
A-10 Thunderbolts (Torque: Military Machines)
Nimitz Aircraft Carriers (Torque: Military Machines) (Military Machines)
F-117A Nighthawks (Torque: Military Machines) (Military Machines)
F-22 Raptors (Military Machines) (Torque: Military Machines)
Monster Vehicles (Cool Rides) (Torque: Cool Rides)
United States Air Force (Torque: Armed Forces)
Eels (Blastoff! Readers: Oceans Alive ) (Oceans Alive)