Question: Who is the creator of the Cashflow board and software games and also the author of the 1997 book Rich Dad Poor Dad.

Context articles: Avernum
Justin Halpern
Robert Kiyosaki
Rich Dad Poor Dad
Midas Touch (book)
Rich Dad
Tenpei Sato
Arthur Kopit
Why We Want You to Be Rich
Doom engine

Avernum is a series of demoware role-playing video games by Jeff Vogel of Spiderweb Software available for Macintosh and Windows-based computers.
 Several are available for iPad and Android tablet.
 There are six canonical games in the series.
 The first three games in the series and the non-canon "Blades of Avernum" are remakes of the "Exile" series by Jeff Vogel, who owns the company, collectively entitled "Avernum: First Trilogy".
 The next three games ("Avernum: Second Trilogy"), also by Vogel, were released in 2005, 2007 and 2009 respectively.
 The latter games are entirely original built on a newer game engine and not a remake of any previous game.
 The "Avernum" games, like other Spiderweb Software games, are designed with gameplay and storytelling before graphical elements.
 As of December 2011, a newer version of Avernum has been released, "", followed by the sequel "" in 2015.
Justin Samuel Halpern (born September 3, 1980) is the American author of the Twitter feed "Shit My Dad Says" and the best-selling book "Sh*t My Dad Says".
 He was also the co-writer and co-executive producer of a CBS television situation comedy series based on the book.
 His second book "I Suck at Girls" was published in 2012 and was the basis for the 2014 television show "Surviving Jack".
Robert Toru Kiyosaki (born April 8, 1947) is an American businessman and author.
 Kiyosaki is the founder of the Rich Dad Company, a private financial education company that provides personal finance and business education to people through books and videos.
 He is also the creator of the Cashflow board and software games to educate adults and children business and financial concepts.
Rich Dad Poor Dad is a 1997 book written by Robert Kiyosaki and Sharon Lechter.
 Also see WikiSummaries of Rich Dad Poor Dad.
 It advocates the importance of financial literacy (financial education), financial independence and building wealth through investing in assets, real estate investing, starting and owning businesses, as well as increasing one's financial intelligence (financial IQ) to improve one's business and financial aptitude.
 "Rich Dad Poor Dad" is written in the style of a set of parables, ostensibly based on Kiyosaki's life.
Midas Touch: Why Some Entrepreneurs Get Rich — And Why Most Don't is a non-fiction book about personal finance, co-authored by Donald Trump and Robert Kiyosaki.
 The book was published in hardcover format in 2011.
 The coauthors became familiar with each other through mutual work at The Learning Annex, and "The Art of the Deal".
 Trump was impressed by Kiyosaki's writing success with "Rich Dad Poor Dad".
 The coauthors then wrote "Why We Want You to be Rich" together in 2006, and followed it up with "Midas Touch" in 2011.
Rich Dad is a brand established by Robert Kiyosaki for a series of educational books and games about personal finance.
 The trademark is owned by Cashflow Technologies, a corporation established in 1997 by Robert and Kim Kiyosaki to market these books and games.
Tenpei Sato (佐藤 天平 , Satō Tenpei ) is a video game composer and voice actor.
 His most notable works are his soundtracks for Nippon Ichi Software games, such as "Disgaea" and "Phantom Brave".
 He also provides voice-over for games and movies.
Arthur Lee Kopit (born May 10, 1937) is an American playwright.
 He is a two-time Pulitzer Prize finalist ("Indians" and "Wings") and a three-time Tony Award nominee: Best Play, "Indians", 1970; Best Play, "Wings", 1979; and Best Book of a Musical, for "Nine", 1982.
 He won the Vernon Rice Award (now known as the Drama Desk Award) in 1962 for his play "Oh Dad, Poor Dad, Mamma's Hung You in the Closet and I'm Feelin' So Sad" and was nominated for another Drama Desk Award in 1979 for his play "Wings".
Why We Want You to Be Rich: Two Men, One Message is a non-fiction book about personal finance, co-authored by Donald Trump and Robert Kiyosaki.
 The book was first published in hardcover format in 2006.
 The coauthors became familiar with each other through mutual work at The Learning Annex, and "The Art of the Deal" author Trump was impressed by Kiyosaki's writing success with "Rich Dad Poor Dad".
 Trump and Kiyosaki subsequently co-authored another book together in 2011, "Midas Touch: Why Some Entrepreneurs Get Rich-And Why Most Don't".
id Tech, also known as id Tech 1 or the "Doom" engine, is the game engine that powers the id Software games "Doom" and "".
 It is also used in "Heretic", "", "Strife: Quest for the Sigil", "Hacx: Twitch 'n Kill", "Freedoom", and other games produced by licensees.
 It was created by John Carmack, with auxiliary functions written by Mike Abrash, John Romero, Dave Taylor, and Paul Radek.
 Originally developed on NeXT computers, it was ported to DOS for "Doom"<nowiki>'</nowiki>s initial release and was later ported to several game consoles and operating systems.