“Guy P. Harrison has become an essential guide to the human mind and a champion of science, reason, and critical thinking. In this new book, the celebrated author of Think and Good Thinking applies his signature wit, insight, and good nature as he tackles the Internet and social media, two omnipresent beasts that he shows us how to tame. From fake news to privacy and filter bubbles, Harrison leaves no stone unturned, and he delivers another brilliant and vitally important book.”
—Julien Musolino, professor of psychology and cognitive science at Rutgers University



Think Before You Like: Social Media’s Effect on the Brain and the Tools You Need to Navigate Your Newsfeed   Prometheus Books, (432pages) ISBN 978-1-63388-351-2    

“[A] skillfully written and researched survey…. [This] book addresses timely topics, such as avoiding information ‘filter bubbles’ and ‘fake news.’ It also contains a well-designed chart for objectively measuring time devoted to social media and cogent advice about healthy use and warning signs. Perhaps the strongest sections are discussions of the importance of critical thinking, ‘standard weak points’ to be aware of in news reports, and five steps to ‘think like a scientist.’ Harrison manages to be firm without being a fearmonger.”

—Publishers Weekly


“We all deserve to live in a social media environment that is responsive, responsible, and humane. So if you’re looking for helpful insights on how to evaluate the health of your own social media habits, how to maintain your privacy in a world of ubiquitous commercial surveillance, how to strengthen good thinking habits in an always-on context, and how to effectively contribute to creating the humane media system we all need, you must read this book.”

—Lynn Schofield Clark, professor, University of Denver; author of The Parent App; and coauthor of Young People and the Future of News

“Harrison looks at what social media is doing to us as individuals, to our culture, and to our lives. Sometimes the results are ugly: addictions float to the surface; we live in self-imposed bubbles of groupthink; and we have difficulty separating real from unreal. But the Internet also allows for love, creativity, and endless communication. Harrison wisely notes that this whiz-bang technology is going to be messy, because it’s at root a deeply communal human creation. Humans made it, humans are constantly remaking it, and the results are going to be chaotic—which might be a good thing. Instead of imagining a utopia just beyond the next Silicon Valley ‘disruption,’ we might be better off realizing that the Internet, like life, does not tend toward overarching ideals. Harrison keeps us planted on the ground even as he investigates the electrical ephemera surrounding, enriching, and sometimes destroying us.”
—Eric Geissinger, author of Virtual Billions and the forthcoming Gamer Nation

“Think Before You Like reveals social media as a ‘vast playground’ of shallow ties, rampant untruths, and endless trivia. But with Harrison’s help, we can create more tolerant, truth-abiding, and thoughtful lives—on- and off-line.” 
—Maggie Jackson, author of Distracted

“Harrison combines outstanding and comprehensive research with engaging, colorful, and entertaining writing. His spot-on book raises and addresses important issues on how we are both victims and beneficiaries of a wired world. Readers should heed his call to pay attention to and think about social media’s role in society and in their lives. This is a fascinating treatment of an important subject.”

—Larry Atkins, author of Skewed: A Critical Thinker’s Guide to Media Bias

“Deeply researched and always engaging, Think Before You Like is a fascinating exploration of online social networks.
If you are on social media, don’t hesitate; read this book now!”

—Adam Alter, associate professor of marketing and psychology at New York University’s Stern School of Business, and author of Irresistible: The Rise of Addictive Technology and the Business of Keeping Us Hooked 



50 Popular Beliefs that People Think Are True     

“What would it take to create a world in which fantasy is not confused for fact and public policy is based on objective reality? I don't know for sure. But a good place to start would be for everyone on Earth to read this book."   


—Neil deGrasse Tyson, director of the Hayden Planetarium at the Rose Center for Earth and Space  



Think: Why you should question everything  


“Rarely has a skeptic gone to battle against nonsense with such warmth and humor.”  —Skeptic magazine  


“Harrison proves himself an excellent guide to reasonable thought in the 'swirling, festering ball of lies and madness' that is the modern world.”  —Publishers Weekly 



Good Thinking: What You Need to Know to be Smarter, Safer, Wealthier, and  wiser

“For all our vaunted intelligence, we human beings believe some really bizarre things. Guy P. Harrison takes us on a judicious, wide-ranging, and entertaining tour of the many dimensions of human mental weirdness, pointing out where we need to be particularly on guard against our poor decision-making processes.”   

—Ian Tattersall, curator emeritus, American Museum of Natural History 




Buy the books 

Amazon author page with links to all Guy's books
Barnes and Noble author page with links to all books
Penguin/Random House author page 

Think Before You Like: Social Media's Effect on the Brain and the Tools You Need to Navigate Your Newsfeed                     

Available in bookstores everywhere as well as Amazon, Books-A-Million, Barnes and Noble, IndieBound and most other online booksellers. 


Good Thinking: What You Need to Know to be Smarter, Safer, Wealthier, and Wiser  

Barnes & Noble: https://www.barnesandnoble.com/w/good-thinking-guy-p-harrison/1121044504?ean=9781633880641 

Books-A-Million: http://www.booksamillion.com/p/Good-Thinking/Guy-P-Harrison/9781633880641?id=7047990513402 

IndieBound: https://www.indiebound.org/book/9781633880641


Think: Why you should question everything  

Barnes & Noble: https://www.barnesandnoble.com/w/think-guy-p-harrison/1114854994?ean=9781616148072 

Books-A-Million: http://www.booksamillion.com/p/Think/Guy-P-Harrison/9781616148072?id=7047990513402 

IndieBound: https://www.indiebound.org/book/9781616148072


50 Popular Beliefs that People Think Are True

Barnes & Noble: https://www.barnesandnoble.com/w/50-popular-beliefs-that-people-think-are-true-guy-p-harrison/1030787594?ean=9781616144951#/ 

Books-A-Million: http://www.booksamillion.com/p/Popular-Beliefs-That-People-Think/Guy-P-Harrison/9781616144951?id=7047990513402 

IndieBound: https://www.indiebound.org/book/9781616144951


Race and Reality: What Everyone Should Know about Our Biological Diversity

Barnes & Noble: https://www.barnesandnoble.com/w/race-and-reality-guy-p-harrison/1114960171?ean=9781591027676 

Books-A-Million: http://www.booksamillion.com/p/Race-Reality/Guy-P-Harrison/9781591027676?id=7047990513402 

IndieBound: https://www.indiebound.org/book/9781591027676


50 Simple Questions for Every Christian

Barnes & Noble: https://www.barnesandnoble.com/w/50-simple-questions-for-every-christian-guy-p-harrison/1113760382?ean=9781616147273
Books-A-Million: http://www.booksamillion.com/p/Simple-Questions-Every-Christian/Guy-P-Harrison/9781616147273?id=7047990513402 

IndieBound: https://www.indiebound.org/book/9781616147273


50 Reasons People Give for Believing in a God

Barnes & Noble: https://www.barnesandnoble.com/w/50-reasons-people-give-for-believing-in-a-god-guy-p-harrison/1008560673?ean=9781591025672#/ 

Books-A-Million: http://www.booksamillion.com/p/Reasons-People-Give-Believing-God/Guy-P-Harrison/9781591025672?id=7047990513402 

IndieBound: https://www.indiebound.org/book/9781591025672



  • Bustle named my latest book, Think Before You Like, one of the top 13 nonfiction books for November, 2017.
  • I took part in an author panel and signed books at the inaugural San Diego Book Festival.
  • Random House selected Think: Why you should question everything  for its First-Year Experience/CommonReads program, making it recommended reading for all first-year university students. I spoke and signed books at the First Year Experience Conference in California
  • San Diego's largest newspaper, The Union Tribune, named Think: Why you should question everything a "book of note"  
  • Canada's largest newspaper, The Toronto Star, praises Think in this article   
  • A Japanese translation  of Think: Why you should question everything is now on sale in Japan 
  • An Italian translation of my book, 50 Reasons People Give for Believing in a God has been published in Italy 
  • Korean and Belarusian translations of Think have been published




  • review  of Think published in Skeptical Inquirer    
  • "Bogus, Bunk, and B.S.", review  of 50 Popular Beliefs that People Think are True in Skeptic magazine
  • Skeptical Inquirer's review  of 50 Popular Beliefs That People Think are True


Interviews and talks 


Social media 

If you dwell in these worlds, connect with me at my Facebook author page  and on Twitter


More links

  • I am an "expert blogger" for Psychology Today. Read essays here 



Email:  guyfeedback [at] gmail.com 


Guy P. Harrison (author)

C/O Prometheus Books

59 John Glenn Drive

Amherst, NY  14228 



A few words about thinking

One of the biggest mistakes we can make in life is to ignore or deny the possibility that we might be dead wrong about something that is very important to us.

Don’t do this!

Question everything. Embrace doubt. Second guess conclusions. Be humble; after all you could be wrong. You might be the first perfect person in all of history and prehistory who is incapable of being fooled by the mistakes, lies and delusions of others. But I doubt it. You might be the first ever to rise above and see through all the deceptive quirks, traps and biases that come standard with a human brain. But I doubt it.

What good is it to hold tight to a position against every challenge if that position is in error? The goal is not to avoid ever changing your mind. The goal is to be right, or as close to it as you can be. If you value wisdom and honesty then you ought to value skepticism. Wisdom is recognizing that you don’t know everything and can be fooled just like every other human who has ever lived. Wise people change their minds when evidence demands it. Honest people don’t pretend to know things that they don’t know.

This fundamental error in thinking crops up most often in politics and religion, of course. These two fertile fields of human thought, passion and silliness encourage if not demand that participants sacrifice their ability to think independently. This treasure is given away freely as rigid lines are drawn and feet set in cement. How can something of such value—the ability and the courage to think freely—be sacrificed by so many people with so little reluctance? Why the haste to become one more zombie in the mob? Why no remorse for the loss of so much humanity?

Do not undervalue your ability to think independently, to grow intellectually over a lifetime, and to always do your best to move closer to truth and reality. The warmth of mindless membership may be appealing at a glance but it’s fool’s gold.

Change. Grow. Improve. Think and be fully human.


—Guy P. Harrison