There is more than a 'single book' discussing Lincoln's plans to export African-Americans out of this country, it is a matter of public record. He did indeed embark on this plan, and the US actually purchased land in Central America, to facilitate this plan. In 1857 he urged the Illinois legislature to appropriate money for colonization. Three months after signing the Emancipation Proclamation, he sent 450 blacks to an island off the coast of Haiti where 100 died within a year.
In retrospect, we can see that Lincoln paved the way for emancipation of slaves and an end to slavery in America, but he was anything but an advocate for the African-American. As a lawyer, he argued cases on behalf of slave owners, and pleaded with the courts to send people back into slavery. Even up until the Civil War, he was pushing a compromise to allow slavery to continue until 1911 in slave states. To believe Lincoln was the epitome of freedom for African-Americans, is equivalent to believing Washington was the epitome of honesty for not lying about that cherry tree!
