Title: Kenneth A. McArthur
Content:  McArthur's best-selling book, IMPACT: How to Get Noticed Motivate Millions and Make a Difference in a Noisy World, was chosen by PR Channel and listed as the number one choice in its "6 Must-Read Books for Public Relations People" list. In 2010, McArthur was featured in the Fast Company Influence Project and listed in the Top-20 Most Influential People Online. In 2013, the brainchild of Seth Godin, Change This, selected McArthur's manifesto, The Impact Manifesto: You Make A Difference Whether You Want To Or Not, for publication which places it in the company of manifesto's from Seth Godin, Hugh MacLeod, Guy Kawasaki, Chris Anderson, Jay Conrad Levinson, Tom Peters, Malcolm Gladwell and Robert Scoble.
Title: The Elements of Influence
Content:  The Elements of Influence was written by Alan D. Kelly, who started, ran and sold Applied Communications, a high-tech Silicon Valley PR and communications research firm from 1992 to 2003. To put a precise date on the text's genesis would be September 5, 1995. At a Paris technology conference, the software mogul and Oracle CEO Larry Ellison, an Applied Communications’ client, declared in a keynote address directly preceding his rival Bill Gates, then Chairman and CEO of Microsoft, that “the PC is a ridiculous device.” It was from this that Kelly derived one of the first plays, the Call Out.”
Title: The Elements of Influence
Content:  The Elements of Influence: The New Essential System for Managing Competition, Reputation, Brand, And Buzz, or simply The Elements of Influence (Dutton, 2006), is a book written by Alan D. Kelly that explains the first complete ontology of influence, known as The Standard Influence Decision System, sometimes referred to as “The Playmaker’s Standard.” In its review of the book, The Wall Street Journal lauded Kelly for “making us look at the time-worn faces of the business world in a fresh and freshly ordered way.”  The book's publication led to the formation of a consultancy, called Playmaker Systems, LLC, and a series of self-service and for-pay web-tools and apps that further explicate the decision support system.
Title: The Anxiety of Influence
Content: Geddes, Dan. Bloom’s Anxiety of Influence. The Satirist. Available at: http://www.thesatirist.com/books/anxiety_of_influence.html ; Hollander, John. "The Anxiety of Influence". March 4, 1973. The New York Times. Available at: https://www.nytimes.com/books/98/11/01/specials/bloom-influence.html 
Title: Jonah Berger
Content: The Catalyst: How to Change Anyone's Mind ; Invisible Influence: The Hidden Factors that Shape Behavior, Simon & Schuster, 2016 ; Contagious: Why Things Catch On, Simon & Schuster, 2013 ; Amazon Best book of 2013 ; Audible Best Audiobook of 2013 
Title: The 100: A Ranking of the Most Influential Persons in History
Content:  The 100: A Ranking of the Most Influential Persons in History is a 1978 book by Michael H. Hart, an astrophysicist, alien life researcher and white separatist. Published by his father's publishing house, it was his first book and was reprinted in 1992 with revisions. It is a ranking of the 100 people who, according to Hart, most influenced human history. Unlike various other rankings at the time, Hart explicitly wasn't attempting to rank on "greatness" as a criterion, but rather how the course of human history most changed due to the actions of that person.
Title: Jason Harris (marketer)
Content:  as brand storytelling and involvement marketing. Harris is also a judge for the Effie Awards, Webby Awards, and the Favourite Website Awards. In 2015, Harris was named the fifth most influential social impact leader. In 2017, Harris was named by the 4As (American Association of Advertising Agencies) as one of the top "100 People Who Make Advertising Great." In 2018, he delivered the commencement speech at his alma mater, James Madison University. Harris is the author of The Soulful Art of Persuasion (Penguin Random House, 2019. ISBN: 9781984822567). In the book, Harris argues that genuine persuasion is about personal character rather than facts and arguments. Based on his experience in business communication, Harris provides 4 key principles and 11 habits for negotiating in an era of social media and global transparency.
Title: Influence: Science and Practice
Content:  Influence: Science and Practice (ISBN: 0-321-18895-0) is a psychology book examining the key ways people can be influenced by "Compliance Professionals". The book's author is Robert B. Cialdini, Professor of Psychology at Arizona State University. The key premise of the book is that in a complex world where people are overloaded with more information than they can deal with, people fall back on a decision making approach based on generalizations. These generalizations develop because they allow people to usually act in a correct manner with a limited amount of thought and time. However, they can be exploited and effectively turned into weapons by those who know them to influence others to act certain ways. A seventh lever on "unity" has been added to the most recent edition. The findings in the book are backed up by numerous empirical studies conducted in the fields of psychology, marketing, economics, anthropology and social science. The author also worked undercover in many compliance fields such as car sales and door-to-door sales.
Title: The 100: A Ranking of the Most Influential Persons in History
Content:  is ranked first, followed by Newton and then Christ—but the book is nonetheless thought-provoking and utterly absorbing." The article in New York Daily News notes: "Hart, an astronomer who investigates planetary atmospheres for the Goddard Space Flight Center in Greenbelt, Md., came down to earth to write 'The 100: A Ranking of the Most Influential Persons in History.' He said he chose, not the most famous or talented, but 'the hundred who had the greatest impact on history and our everyday lives.' The book, which took three years to research and write, is now in its second printing. His 
Title: How to Win Friends and Influence People
Content:  at Andreessen Horowitz, is titled "How to Win Founders and Influence Everybody". ; The book is said to have greatly influenced the life of television and film actress Donna Reed. It was given to her by her high school chemistry teacher Edward Tompkins to read as a sophomore at Denison (Iowa) High School in 1936. Upon reading it she won the lead in the school play, was voted Campus Queen and was in the top 10 of the 1938 graduating class. ; Charles Manson used what he learned from the book in prison to manipulate women into killing on his behalf. 

Question: Who is the author of Impact?
Answer: Douglas Preston.
Douglas Jerome Preston.
Douglas J. Preston.