The Ghanaian national literature radio programme and accompanying publication ''Voices of Ghana'' was one of the earliest on the African continent. The most prominent Ghanaian authors are novelists; J. E. Casely Hayford, Ayi Kwei Armah and Nii Ayikwei Parkes, who gained international acclaim with the books, ''Ethiopia Unbound'' (1911), ''The Beautyful Ones Are Not Yet Born'' (1968) and ''Tail of the Blue Bird'' (2009), respectively. In addition to novels, other literature arts such as Ghanaian theatre and poetry have also had a very good development and support at the national level with prominent Ghanaian playwrights and poets Joe de Graft and Efua Sutherland.