Richard Channing Garfield (born June 26, 1963) is an American game designer.
 Garfield created "", which is considered to be the first modern collectible card game (CCG).
 "Magic" debuted in 1993, and its success spawned many imitations.
 Garfield oversaw the successful growth of "Magic" and followed it with other game designs.
 Garfield also designed the living card game (LCG) "Netrunner", as well as "BattleTech", "" (originally known as "Jyhad"), "Star Wars Trading Card Game", the card game "The Great Dalmuti", and the board game "RoboRally".
 He also created a variation of the card game Hearts called Complex Hearts.
 Garfield first became passionate about games when he played the roleplaying game "Dungeons & Dragons", so he designed "Magic" decks to be customizable like roleplaying characters.
 Garfield and "Magic "are in the Adventure Gaming Hall of Fame.
Bang!
 is a Wild West-themed social deduction card game, designed by Emiliano Sciarra and released by Italian publisher daVinci Editrice in 2002.
 In 2004, "Bang!"
 won the Origins Award for "Best Traditional Card Game of 2003" and "Best Graphic Design of a Card Game or Expansion".
A collectible card game (CCG), also called a trading card game (TCG) or customizable card game, is a kind of card game that first emerged in 1993 and consists of specially designed sets of playing cards. Successful CCGs typically have upwards of thousands of unique cards, with the first developed, and most successful one, "", now having over 17,000.
Victoria Elizabeth Coren Mitchell (born Victoria Elizabeth Coren; 18 August 1972) is an English writer, presenter and professional poker player.
 Coren Mitchell writes weekly columns for "The Observer" and has hosted the BBC television quiz show "Only Connect" since 2008.
Once More, with Feeling: How We Tried to Make the Greatest Porn Film Ever is a 2003 book by Victoria Coren and Charlie Skelton.
 The authors, whose only experience of the pornography industry were as journalists for the "Erotic Review" magazine, set out to make a pornographic film which would differ from the industry's standard output.
 "Once More, with Feeling" is their account of the time they spent researching and shooting the film.
Pokémon Trading Card Game, originally released in Japan as "Pokémon Card GB" (ポケモンカードGB , Pokemon Kādo Jī Bī ) is a video game adaptation of the original tabletop trading card game of the same name, which in turn was based on the "Pokémon" role-playing video game series.
 Developed by Hudson Soft and published by Nintendo, it was initially released in Japan in December 1998, with an English version appearing in North America in April 2000 and in Europe the following December.
 The title features digital version of cards from the first three sets of the trading card game originally released in English by Wizards of the Coast between 1998 and 1999, as well as exclusive cards not available outside of the game.
Star Wars: Customizable Card Game (SW:CCG) is a customizable card game based on the "Star Wars" fictional universe.
 It was created by Decipher, Inc., which also produced the "Star Trek Customizable Card Game" and "The Lord of the Rings Trading Card Game".
 The game was produced from December 1995 until December 2001.
 Operation and oversight of the game was then taken over by a Decipher created volunteer group called the Star Wars Customizable Card Game Players Committee.
 To date, the Players Committee, or PC, still runs the game and creates new cards known as "virtual cards" that are released online in PDF format, and can then be printed and played with.
 "SW:CCG" can also be played online: Holotable.com is the official Player Committee platform.
The Pokémon Trading Card Game (ポケモンカードゲーム , Pokemon Kādo Gēmu , "Pokémon Card Game") , abbreviated to PTCG or Pokémon TCG, is a collectible card game, based on the Pokémon video game series, first published in October 1996 by Media Factory in Japan.
 In the US, it was initially published by Wizards of the Coast; Nintendo eventually took over publishing the card game alongside the video games in June 2003.
The Catan Card Game, originally named The Settlers of Catan: The Card Game, is a card game adaptation of "The Settlers of Catan".
 It is a member of the "Catan" series of games, and is published by Kosmos in German, and Mayfair Games in English.
 The "Catan Card Game" is a two-player game, although the rules can be accommodated as to allow players to share a set or for each player to have their own.
 Seven expansions of the "Catan Card Game" have been released.
The Spoils is a collectible card game owned by Arcane Tinmen.
 The design team was headed up by Josh Lytle, who also designed the collectible card game Magi-Nation Duel.
 Jon Finkel, a prominent player in 's , aided the development team as an advisor since 2002.
 Under the direction of Ken Pilcher, The Spoils Card Game won the Fan Favorite Origins Award for Best Collectible Card Game at the 2015 Origins Game Fair, beating other contenders including Legend of the Five Rings and Magic: The Gathering.
 It was announced on December 29th 2016 that Organized Play and production of The Spoils Card Game will officially cease on January 1st 2017.

Question: Once More, with Feeling is a 2003 book by an English writer and presenter, who is also a professional at what card game?
Answer: poker