Question: Ed Skrein has had a role as the character from the series of novels by which American author?

Context paragraphs:
Daario Naharis: Daario Naharis is a fictional character in the "A Song of Ice and Fire" series of fantasy novels by American author George R. R. Martin, and its television adaptation "Game of Thrones".

Ed Skrein: Edward George "Ed" Skrein ( ; born 29 March 1983) is an English actor and rapper.  Outside his rap career, he is best known for his roles as Daario Naharis in Season 3 of "Game of Thrones", Frank Martin Jr. in "The Transporter Refueled" and Francis Freeman/Ajax in "Deadpool" (2016).

Robert B. Parker: Robert Brown Parker (September 17, 1932 – January 18, 2010) was an American writer of fiction, primarily of the mystery/detective genre.  His most famous works were the 40 novels written about the private detective Spenser.  ABC television network developed the television series "" based on the character in the mid-1980s; a series of TV movies based on the character were also produced.  His works incorporate encyclopedic knowledge of the Boston metropolitan area.  The Spenser novels have been cited by critics and bestselling authors such as Robert Crais, Harlan Coben and Dennis Lehane as not only influencing their own work but reviving and changing the detective genre.  Parker also wrote two other series based on an individual character: He wrote nine novels based on the character Jesse Stone and six novels based on the character Sunny Randall.  Mr. Parker wrote four Westerns starring the duo Virgil Cole and Everett Hitch.  The first, Appaloosa, was made into a film with Ed Harris.

Jon Snow (character): Jon Snow is a fictional character in the "A Song of Ice and Fire" series of fantasy novels by American author George R. R. Martin, and its television adaptation "Game of Thrones".  He is a prominent point of view character in the novels, and has been called one of the author's "finest creations" and most popular characters by "The New York Times".  Jon is a main character in the TV series, and his storyline in the 2015 season 5 finale generated a strong reaction among viewers.  Speculation about the character's parentage has also been a popular topic of discussion among fans of both the books and the TV series.

List of accolades received by Deadpool (film): "Deadpool" is a 2016 American superhero film based on the Marvel Comics character of the same name, distributed by 20th Century Fox.  It is the eighth installment of the "X-Men" film series.  The film was directed by Tim Miller from a screenplay by Rhett Reese and Paul Wernick, and stars Ryan Reynolds in the title role alongside Morena Baccarin, Ed Skrein, T. J. Miller, Gina Carano, Leslie Uggams, Brianna Hildebrand, and Stefan Kapičić.  In "Deadpool", Wade Wilson hunts the man who gave him mutant abilities, but also a scarred physical appearance, as the wisecracking, fourth wall-breaking antihero Deadpool.

List of box office records set by Deadpool (film): "Deadpool" is a 2016 American superhero film based on the Marvel Comics character of the same name, distributed by 20th Century Fox.  It is the eighth installment of the "X-Men" film series.  The film was directed by Tim Miller from a screenplay by Rhett Reese and Paul Wernick, and stars Ryan Reynolds in the title role alongside Morena Baccarin, Ed Skrein, T. J. Miller, Gina Carano, Leslie Uggams, Brianna Hildebrand, and Stefan Kapičić.  In "Deadpool", Wade Wilson hunts the man who gave him mutant abilities, but also a scarred physical appearance, as the wisecracking, fourth wall-breaking antihero Deadpool.

Deadpool (film): Deadpool is a 2016 American superhero film based on the Marvel Comics character of the same name, distributed by 20th Century Fox.  It is the eighth installment of the "X-Men" film series.  The film was directed by Tim Miller from a screenplay by Rhett Reese and Paul Wernick, and stars Ryan Reynolds in the title role alongside Morena Baccarin, Ed Skrein, T. J. Miller, Gina Carano, Leslie Uggams, Brianna Hildebrand, and Stefan Kapičić.  In "Deadpool", Wade Wilson hunts the man who gave him mutant abilities, but also a scarred physical appearance, as the antihero Deadpool.

The Elminster Series: The Elminster Series is a series of fantasy novels by author Ed Greenwood.  The novels are set in the "Forgotten Realms" setting created by Greenwood for the "Dungeons & Dragons" fantasy role-playing game.  The series focuses on the titular character Elminster who was a key figure in several of Greenwood's other novels set in the Forgotten Realms setting.  Elminster was known as a powerful wizard or mage known as "The One Who Walks" and eventually "The Sage of Shadowdale."  This series seeks to present the backstory of Elminster's life as well as provide a history of other important events in this particular fantasy setting.

Drama High: Drama High is an ongoing series of young adult fiction novels written by the American author L. Divine.  The series comprises 18 novels and follows the main character, Jayd Jackson through her life in Los Angeles, California as she struggles to balance school, friendships, family, and all the drama that comes with them.  The novels contain an element of speculative fiction as the main character comes from a long line of voodoo priestesses and is a priestess in training.  The first fourteen books were published through Dafina, an imprint of Kensington Books.  Starting in 2012 Divine began self-publishing the series under Ebb & Flow Publications/L.  Divine Inc.

The Transporter Refueled: The Transporter Refueled (French: Le Transporteur : Héritage) is a 2015 French action film directed by Camille Delamarre and written by Bill Collage, Adam Cooper, and Luc Besson.  It is the fourth film in the "Transporter" franchise, a reboot to the previous films, and the first film to be distributed by EuropaCorp in North America, but features a new cast, with Ed Skrein replacing Jason Statham as the title role of Frank Martin.  It is the first installment of a planned "Transporter" reboot trilogy.

Supporting paragraphs: Ed Skrein Daario Naharis
Answer: George R. R. Martin