13 books • 7 series
Birds, Nests, and Eggs (Young Naturalist Field Guides) (Take-Along Guide) (Take Along Guides) (Take-Along Guides) (Take Along Guides)
Rabbits, Squirrels, and Chipmunks (Take Along Guides) (Take-Along Guides) (Take Along Guides) (Young Naturalist Field Guides)
Caterpillars, Bugs, and Butterflies (Take Along Guides) (Take-Along Guides) (Take-Along Guide) (Young Naturalist Field Guides)
Incredible Constructions and the People Who Built Them (Walker's American History Series for Young People)