The longlists for the Wales Book of the Year award were revealed at Bangor Business School's management centre
Organisers of the Wales Book of the Year award praised the "vibrancy" of writing as lesser-known and younger authors dominated the nominations.
The longlists for the £10,000 prize include debut novels, poetry, travel writing, a memoir and short stories.
There are also accounts of the history of Welsh painting and the origins of the medieval Welsh tales the Mabinogi.
An English and Welsh shortlist will be revealed at the Hay Festival, and the winners announced on 30 June.
Now in its 18 year, the awards are presented to the best books of the year in the English and Welsh languages.
The English language list includes debut novels from Mike Thomas and Terri Wiltshire, Alun Trevor's memoir of a Welsh childhood, travel writing by Horatio Clare, short stories from Emyr Humphreys, and poetry from Jasmine Donahaye, Philip Gross and Richard Marggraf Turley.
Peter Lord is nominated for his scholarly account of the history of Welsh painting and Nikolai Tolstoy for his analysis of the origins of the Mabinogi.
Chairman of the English language judges, Ian Gregson, said: "This year's list is especially exciting because almost all the best books this year were by lesser-known or younger writers, notably the two novelists and the three poets.
"It's also conspicuously varied in terms of genre."
The awards are administered by Academi, the Welsh national literature promotion agency and society for authors.
They are funded by the Arts Council of Wales through its income from the Welsh Assembly Government.
The authors on the Welsh language longlist are Siân Melangell Dafydd, John Davies, Hywel Griffiths, Caryl Lewis, Haf Llewelyn, D. Densil Morgan, Sian Owen, Manon Rhys, Cefin Roberts and Manon Steffan Ros.
Academi chief executive, Peter Finch, said: "The Wales Book of the Year award means something.
"It marks longlisted authors as winners and gives readers a pretty reliable indication of which books they should tackle next.
"This year's list includes a number of new names, a sure indicator of the vibrancy of Welsh culture, and stretches itself right across the forms."