Clarke's thesis, through the University of Exeter, postulated that the archaeology of the Cold War can be utilised in the mapping of human intervention in the landscape.

This set the scene for further works including Ten Tons for Tempelhof: The Berlin Airlift in May 2007, publishing the memories of many veterans for the first time, along with pictures from private collections.

Airfields is the first publication to bring together all periods of military aviation, including the Cold War, and discuss them utilising a framework of landscape archaeology.

In December 2008 The Jet Provost: A Little Plane With a Big History was released by Amberley Publishing, followed, in October 2009, by The Illustrated Guide to Armageddon.

Subjects include Cold War nuclear bunkers in Wiltshire, Bronze Age metalwork, Roman building techniques, earthworks near Stonehenge, and Saxon executions.