55 books • 6 series
Orthocones (Ancient Marine Life)
Livyatan (Ancient Marine Life)
Basilosaurus (Ancient Marine Life)
Dunkleosteus (Ancient Marine Life)
The Cold War (War Histories)
The American Revolutionary War (War Histories)
The American Civil War (War Histories)
Megalodon (Ancient Marine Life)
Sea Scorpions (Ancient Marine Life)
Ichthyosaurs (Ancient Marine Life)
Plesiosaurs (Ancient Marine Life)
Archelon (Ancient Marine Life)
Mosasaurs (Ancient Marine Life)
Botanist (Careers in Stem)
Chemist (Careers in Stem)
Geologist (Careers in Stem)
Architect (Careers in Stem)
Sea Horses (Animals of the Coral Reef)
Giant Clams (Animals of the Coral Reef)
Parrotfish (Animals of the Coral Reef)
Angelfish (Animals of the Coral Reef)
Delivery Drivers (Community Helpers)
Counselors (Community Helpers)
Cashiers (Community Helpers)