Eric Flint wrote these books from Dave’s plot outlines:
An Oblique Approach. 1998, Baen.
In the Heart of Darkness. 1998, Baen.
Destiny’s Shield. 1999, Baen.
Fortune’s Stroke. 2000, Baen.
The Tide of Victory. . 2001, Baen.
The Dance of Time. 2006, Baen.
Belisarius I: Thunder at Dawn. 2008, Baen. Contains An Oblique Approach and In the Heart of Darkness.
Belisarius II: Storm at Noontide. 2009, Baen. Contains Destiny’s Shield and Fortune’s Stroke.
Belisarius III: The Flames of Sunset. 2009, Baen. Contains The Tide of Victory and The Dance of Time.