In this Level 1 reader, youngsters learn all about the terrifying giants that once roamed the Earth-maybe even as close as their own backyard! They'll be wowed by new information and eye-popping illustrations from National Geographic, a trusted source of children's nonfiction content There's nothing more fascinating than dinosaurs. In this Level 1 reader, youngsters learn all about the terrifying giants that once roamed the Earth&—maybe even as close as their own backyard! They'll be wowed by new information and eye-popping illustrations from National Geographic, a trusted source of children's nonfiction content There's nothing more fascinating than dinosaurs. Young readers will learn all about the terrifying giants that once roamed the Earth - maybe even as close as their own backyard! They'll be wowed by new information and eye-popping illustrations from National Geographic.