Full of facts about our fledgling democracy, the call for a national government, and the Constitutional Convention, Unite or Die: How 13 States Became a Nation presents American history with personality, good humor, and energy. Jef Czekaj's exuberant illustrations capture the excitement of opening night and the elation of the birth of a nation.

Tribes of the Great Plains shared some similarities in culture and tradition, but each had distinctive qualities that made them unique. Follow this slideshow to learn about some of the Native American tribes that inhabited the Great Plains during the 19th century.