The book "Letters and discussions on the formation of colored regiments and the duty of colored people in connection with the great rebellion of slave owners in the United States of America" was written by Alfred M. Green. In this book, the author highlights the importance of the participation of African-American citizens in the struggle for freedom and opposition to the slave rebellion in the United States. Green analyzes the formation of the colored regiments and the importance of their role in this conflict, examining the moral and social aspects of participation in the war. This book is an important contribution to understanding the history and importance of issues of racial equality, becoming an important source for the study of the Civil War period in the United States.