Robert Cowley

도서
What If? What If?
What If?
1999년
The Cold War The Cold War
The Cold War
2005년
What Ifs? Of American History What Ifs? Of American History
What Ifs? Of American History
2004년
What If? II What If? II
What If? II
2001년
The Killing Season The Killing Season
The Killing Season
2025년

오디오북
What If...? Vol 1 (Abridged) What If...? Vol 1 (Abridged)
What If...? Vol 1 (Abridged)
1999년
What If...? Vol 3 (Abridged) What If...? Vol 3 (Abridged)
What If...? Vol 3 (Abridged)
2000년
The Killing Season: The Autumn of 1914, Ypres, and the Afternoon That Cost Germany a War (Unabridged) The Killing Season: The Autumn of 1914, Ypres, and the Afternoon That Cost Germany a War (Unabridged)
The Killing Season: The Autumn of 1914, Ypres, and the Afternoon That Cost Germany a War (Unabridged)
2025년
What If...? Vol 2 (Abridged) What If...? Vol 2 (Abridged)
What If...? Vol 2 (Abridged)
2001년