John Quincy Adams: American Visionary

The Illustrated Battle Cry of Freedom: The Civil War Era

Lincoln: The Biography of a Writer

This Republic of Suffering: Death and the American Civil War (National Book Award Finalist)

His Masterly Pen: A Biography of Jefferson the Writer

Narrative of the Life of Frederick Douglass: An American Slave

Thomas Carlyle: A Biography

Personal Memoirs of Ulysses S. Grant: Volumes One and Two

Dickens: A Biography

John Adams

Henry James: The Imagination of Genius, A Biography

Team of Rivals: The Political Genius of Abraham Lincoln

Gore Vidal

The Rise of Theodore Roosevelt

Twelve Years a Slave

Crazy Horse and Custer: The Parallel Lives of Two American Warriors

The Flags of the Confederacy

Killing Lincoln: The Shocking Assassination that Changed America Forever

The Demon of Unrest: A Saga of Hubris, Heartbreak, and Heroism at the Dawn of the Civil War