The Notgrass Exploring America 2019 Hardcover Set Parts 1&2 + Voices + Guide/Key is a comprehensive textbook series on American history written by Ray Notgrass. This set includes two hardcover volumes, as well as additional voices and a guide/key, making it an ideal resource for high school students studying American history at an intermediate level. Published by Notgrass Company in 2019, this book set offers a detailed exploration of American history in an engaging and informative manner, providing students with a valuable educational tool for understanding the complexities of the United States’ past.