Orkney: Megalithic Marvel of the Northern Isles (Wooden Books)

Walking on the Orkney and Shetland Isles: 80 walks in northern isles (Cicerone guidebooks)

Megalithic Ireland: Cairns, Tombs, Henges & Circles (Wooden Books U.K. Series)

Acoustics: The Art of Sound (Wooden Books U.K. Series)

The Northern Earldoms: Orkney and Caithness from Ad 870 to 1470