"Adios, America" is a book written by Ann Coulter that discusses immigration policies in the United States. In the book, Coulter argues that unchecked immigration is detrimental to American culture, economy, and security. She presents her views on how immigration has changed the nation and advocates for stricter immigration controls. The book also critiques the political and social implications of immigration, suggesting that it leads to a loss of national identity. Coulter emphasizes the need for a more selective immigration process to preserve what she sees as the core values of American society.