The King in the North: The Life and Times of Oswald of Northumbria

The Prometheans: John Martin and the generation that stole the future

The Mercian Chronicles: King Offa and the Birth of the Anglo-Saxon State, AD 630–918

Unquiet Women: From the Dusk of the Roman Empire to the Dawn of the Enlightenment

Admiral Collingwood: Nelson's Own Hero

The First Kingdom: Britain in the age of Arthur

In the Land of Giants

The Museum of the Wood Age

The Little Book of Planting Trees

Trees of Life

The Wisdom of Trees: A Miscellany