The 1866 message within the book encapsulates Johnson's approach to reuniting a fractured nation post-Civil War. Written rather than spoken, this address conveys Johnson's controversial strategy of leniency towards Confederate leaders.

This volume contains correspondence related to the aftermath of the Civil War, including Johnson's ascension to the presidency and the beginnings of the conflict with Congress that would result in his near-impeachment.

The correspondence in this volume is related to Johnson's presidency during the Reconstruction Era, including the president's impeachment and the subsequent trial, which resulted in the Senate narrowly voting not to remove him from office.