Author: Tudur Dylan Jones.

Series: Cyfres yr Onnen.

Banksy was Owen's hero. That mythical man who created graffiti during the night but, by morning, the artist had disappeared, leaving only the art. Why couldn't Owen disappear like his hero? Create his art, then disappear.

Awdur: Tudur Dylan Jones.

Cyfres: Cyfres yr Onnen.

Mae Owen yn artist dawnus, sy'n creu lluniau graffiti ar un o waliau'r dre yn y dirgel, ganol nos. Ond mae 'na gysylltiad rhwng y lluniau â phobl ddieithr sy'n cyrraedd yr ysgol ...