Legend Press and Bloomsbury both have two books on the £30,000 University of Wales Dylan Thomas Prize's 2012 longlist, which looks to reward the work of writers published in the English language aged 18 to 30.
This year's longlist also includes two of the prize's youngest ever entrants, 20-year-old British writer Ben Brooks' Grow Up (Canongate), and 21-year-old Chibundu Onuzo's The Spider King's Daughter (Faber).
Bloomsbury's Once You Break a Knuckle by D N Wilson and Diving Belles by Lucy Wood are both on the list, alongside My Dearest Johah by Matthew Crow and Tea at the Grand Tazi by Alexandra Singer (both Legend Press).
Random House also has two titles on the list, with The Doll Princess by Tom Benn, published by Vintage, and The White Shadow by Andrea Eames, published by Harvill Secker/Random House.
Also on the list are Threats by Amelia Gray (Farrar, Straus & Giroux), and Seating Arrangements by Maggie Shipstead (Blue Door).
Founding chairman of the prize, Peter Stead, said: "Once again we have another quality longlist with an extensive international span. The calibre of the ten longlisted works is outstanding and I'm sure the next few weeks are going to see a number of heated debates as the judging panel whittles down this list of 10 extremely talented young writers to the final shortlist for this year's prize."
The shortlist will be announced in September, with the winner of the £30,000 prize to be announced at an awards ceremony in Dylan Thomas' hometown of Swansea on 9th November.