Max Porter, an editor and former bookseller, has won the £30,000 International Dylan Thomas prize for his “extraordinary feat of imaginative prose”, Grief Is the Thing With Feathers.

Described by the award administrators as “part novella, part polyphonic fable, part essay on grief”, the debut tells of how the death of a mother affects her two young sons and their father, a Ted Hughes scholar. As they face the blackest moment of their grief, they are visited by Hughes’s creation Crow, who helps them heal.

Shortlisted for the Guardian first book award last year, the book was named winner of the Dylan Thomas prize on Saturday afternoon at Swansea University, on International Dylan Day. The prize is for the best work of English-language literary fiction – poetry, drama or prose – by a writer of 39 or under, marking Thomas’s own death shortly after his 39th birthday.   MORE