15 books • 8 series
Butterflies (Spotter's Guide) (Spotter's Sticker Books) (Usborne Spotter's Guide) (Usborne New Spotters' Guides)
Pawnee Indians (Civilization of American Indian S.) (The Civilization of the American Indian)
Indians of the Woodlands from Prehistoric Times to 1725 (Civilization of American Indian S.)
Spotted Tail's Folk (The Civilization of the American Indian) (Civilization of American Indian S.)