Question: What British book retailer featured Maggie O'Farrell in "25 Authors for the Future."?

Context articles: Barnes &amp; Noble Nook 1st Edition
Mike Conroy (writer)
Blackwell UK
Quarter bin
Midtown Comics
Jane Harris (writer)
Heroes Convention
Maggie O'Farrell
Crossword Book Award
Waterstones

The Nook 1st Edition (styled "nook") is the first generation of the Nook e-book reader developed by American book retailer Barnes & Noble, based on the Android platform.
 The device was announced in the United States in October 2009 and was released the next month.
 The Nook includes Wi-Fi and AT&T 3G wireless connectivity, a six-inch E Ink display, and a separate, smaller color touchscreen that serves as the primary input device.
 In June 2010 Barnes & Noble announced a Wi-Fi-only model of the Nook.
 The second-generation Nook, the Nook Simple Touch, was announced May 25, 2011 with a June 10 release date.
Mike Conroy is a British ex-comic book retailer best known for co-creating the Eagle Awards in 1976, with Richard Burton.
 In the mid-1990s Conroy concentrated on his freelance writing, ultimately replacing Phil Hall as news editor of the trade magazine "Comics International".
Blackwell UK, also known as Blackwell's and Blackwell Group, is a British academic book retailer and library supply service.
 It was founded in 1879 by Benjamin Henry Blackwell, after whom the chain is named, in Oxford on Broad Street.
 The firm now has a chain of 45 shops, and an accounts and library supply service.
 It employs around 1000 staff in its divisions.
Quarter bin is a phrase common in the American comic book community used to describe discount boxes of comic books sold for far less than the cover price.
 Typically going for $0.25 a piece, these comic books may be used, damaged, or new material that's been overstocked by the comic book retailer.
 Quarter bins tend to be unique to the comic book direct market, though they may be found in thrift stores and other stores selling used media (video games, compact discs, dvds, etc.).
Midtown Comics is a New York City comic book retailer with three shops in Manhattan and an e-commerce website.
 The largest comic book store in the United States, the company opened its first store in the Times Square area in 1997.
 Its second was opened on Lexington Avenue in 2004, and is known as the Grand Central store for its proximity to Grand Central Terminal.
 Its Downtown store was opened on Fulton Street in the Financial District in November 2010.
 It also used to operate a boutique inside Manhattan's Times Square Toys R Us.
Jane Harris (born 1961) is a British writer of fiction and screenplays.
 Her most recent work is the critically acclaimed "Gillespie and I".
 Her first novel, "The Observations", was shortlisted for the Orange Prize for Fiction 2007.
 Waterstone's, the UK bookstore chain, has chosen her as one of its 25 Authors for the Future.
Heroes Convention, or HeroesCon, is a comic book convention that takes place in June (often over Father's Day weekend) in Charlotte, North Carolina.
 The convention has been held since 1982 and is one of the oldest and largest independent comic book conventions in the United States.
 The convention has a history of charitable work, donating to the Comic Book Legal Defense Fund and the Charlotte Firefighters Burned Children's Fund.
 HeroesCon is organized by Shelton Drum, owner of Heroes Aren't Hard To Find, a comic book retailer just southeast of downtown Charlotte.
Maggie O'Farrell (born 1972, Coleraine Northern Ireland) is a Northern Irish author of contemporary fiction, who features in Waterstones' "25 Authors for the Future."
 Her book "The Hand That First Held Mine" won the 2010 Costa Novel Award.
The Crossword Book Award (in full: Crossword Book Award (1998–2003), Hutch Crossword Book Award (2004–07), Vodafone Crossword Book Award (2008–10), Economist Crossword Book Award (2011–13), Raymond & Crossword Book Award (2014–present)) is an Indian book award hosted by Crossword Bookstores and their sponsors.
 The Award was instituted in 1998 by Indian book retailer Crossword with the intention of competing with The Booker Prize, Commonwealth Writers' Prize or The Pulitzer Prize.
Waterstones, formerly Waterstone's, is a British book retailer that operates 275 stores, employing around 3,500 staff in the UK and Europe in February 2014.
 Established in 1982 by Tim Waterstone, after whom the company was named, the bookseller expanded rapidly until being sold in 1993 to WHSmith.
 Bought again in 1998 by Waterstone, EMI & Advent International, the company was taken under the umbrella of HMV Group, which later merged the Dillons and Ottakar's brands into the company.