Winner of the Prose Medal at the 2018 National Eisteddfod. This is the amazing story of Siôn, who is forced to grow up suddenly, his mother Rowenna and his young sister, Dwynwen. His story is recorded in a blue notebook as the family try to survive a nuclear accident that has a catastrophic effect on the inhabitants of the village of Nebo and beyond.

Nofel arobryn y Fedal Ryddiaith yn Eisteddfod Genedlaethol Cymru, 2018. Dyma stori ryfeddol Siôn, a orfodwyd i dyfu'n ddyn yn sydyn iawn, ei fam Rowenna, a'i chwaer fach, Dwynwen. Mae'r hanes hynod wedi'i gofnodi mewn llyfr nodiadau glas wrth geisio goroesi ar ôl Y Terfyn - yr hunllef a gafodd effaith ddychrynllyd ar drigolion pentref Nebo a thu hwnt.