The search for lost America : the mysteries of the stone ruins /

by Trento, Salvatore Michael
Published 1978

How the sun god reached America, c.2500 BC : a guide to megalithic sites /

by Jonge, Reinoud M. de
Published 2002

Ancient stone sites of New England and the debate over early European exploration /

by Goudsward, David
Published 2006

Rocks & rows : sailing routes across the Atlantic and the copper trade /

by Wakefield, Jay S.
Published 2010