The book "Facts for the People of the Free States" was written by the American and Foreign Anti-Slavery Society. This work is a significant contribution to the struggle for the abolition of slavery in the United States of America. The authors offer readers objective information that confirms the harmful impact of slavery on society and individual lives of people. The book presents facts, statistics and analysis that demonstrate the unreasonableness and cruelty of this bad practice. "Facts for the People of the Free States" calls for unity and action to ensure equal rights and freedom for all people, regardless of race or social affiliation.