US History OER Textbooks
Here are some OER textbooks that I use in my Hist 1301 and 1302 classes.
A Peoples' History of the United States
US History: Pre Columbian to the New Millennium
The American Yawp
Introduction to US History (Open Stax)
US to 1877 (Lumen Learning OS Edition)
US History Since 1877 (Lumen Learning OS Edition)
Sage American History
US History (Wiki Book)
African American History
A History of Mexican American People (Julian Samora)