Normal People's novel, Sally Rooney, who has won beautiful reviews and a ball to become drama & BBC, has been named in the best book from 2018 by Waterstones.
The novel tells the secret story of a relationship between two school friends in a small Irish town after the financial crisis.
Cloddiau Dŵr said the book confirmed the 27-year-old writer as "one of the excellent novelists at work today".
Rooney, born in Dublin, said she had "been touched by the honor".
Normal People is the second novel of Rooney and has been listed for the Man Booker Award earlier this year.
He was described as "classic classic" by the Guardian, "great" by Irish Times, and "quite stunning" by the Independent.
The book will be turned into a drama series by the Irish director Lenny Abrahamson, who made his name with Frank & 2014.
He won his next film, Room, Brie Larson, Oscar's best actor in 2016.
The other shortlisted Waterstones books were:
- Everything I Know About a Girlfriend without Dolly Alderton
- Penguin Classics Book by Henry Eliot
- Why We Get Wrong Politicians by Isabel Hardman
- Color of Time: New World History, 1850-1960 by Dan Jones and Marina Amaral
- Circe by Madeline Miller
- Written Barrister: Law Stories and How to Explode by The Barrister Secret
- I'm the Seed Grew the Tree: A Nature Poem for Every Day of the Year chosen by Fiona Waters and illustrated by Frann Preston-Gannon
Follow us on Facebook, on Twitter @BBCNewsEnts, or on Instagram in bbcnewsents. If you have a story suggestion email email@example.com