Gareth Madgwick

 wrote sevaeral stories for the Lethbridge-Stewart series.

Lethbride-Stewart

 * Home Fires Burn
 * Warriors of Montu

Lethbridge-Stewart

 * The Great Magician and the Spirits of the Vasty Deep (in The HAVOC Files 4)
 * Inheritance (in Lineage)

Faction Paradox

 * A Reasonable Man (in The Boulevard: Volume One)