Aimed at young (at heart) people, this comic-strip format book introduces the discovery, and associated challenges of interpretation, of a petroglyph found, disturbed, in the entrance passage way of Middle Iron Age hillfort, at Nesscliffe in Shropshire, UK. The Nesscliffe petroglyph ('Nessglyph') is made using two types of engraving technologies - grinding and carving (chiselling) - applied several centuries apart. A Bronze Age 'cup mark' (c.14th C. BCE) was scored over in the Iron Age or Romano British period (500 BCE-400 CE) to produce a representation of a "horned deity", which can be associated with a tribal name of a local people called the CORNOVII ('Horned Ones') by the geographer Ptolemy in the 2nd.C CE.