Question: Hello Dr. Barkley,
  
  I've been reading through your back catalogue, the most popular books are on their second or forth edition; this makes it easier to disregard dated previous editions.
  
  For your other books that never receive a updated edition like 'ADHD and the Nature of Self-Control' from 1997 are there any points or conclusions you'd warn against now as out of date or no longer supported by evidence?
  
  Thanks, and I appreciate the audiobook releases, it's made reading them easier for me.
Answer: Some of my books, like ADHD in Adults: What the Science Says (2008) don't get updated because they reported the results of two huge studies I did and what they all meant along with a review of the relevant literature.  So that's a one time thing.
  
  The book you noted, which is my initial EF Theory of ADHD, was updated but with a new title, Executive Functions:What they are, how they work, and why they evolved (2012).  The theory remains solid to this day so I have no plans to change the book, though I did at a postscript to the paperback edition that came out in 2020.  
  
  Nearly all my others get updated every 7-10 years, including Taking Charge of Adult ADHD coming out in its second edition in September.  Thanks for asking
content: Q: Hello Dr. Barkley,
  
  I've been reading through your back catalogue, the most popular books are on their second or forth edition; this makes it easier to disregard dated previous editions.
  
  For your other books that never receive a updated edition like 'ADHD and the Nature of Self-Control' from 1997 are there any points or conclusions you'd warn against now as out of date or no longer supported by evidence?
  
  Thanks, and I appreciate the audiobook releases, it's made reading them easier for me.
   Ans: Some of my books, like ADHD in Adults: What the Science Says (2008) don't get updated because they reported the results of two huge studies I did and what they all meant along with a review of the relevant literature.  So that's a one time thing.
  
  The book you noted, which is my initial EF Theory of ADHD, was updated but with a new title, Executive Functions:What they are, how they work, and why they evolved (2012).  The theory remains solid to this day so I have no plans to change the book, though I did at a postscript to the paperback edition that came out in 2020.  
  
  Nearly all my others get updated every 7-10 years, including Taking Charge of Adult ADHD coming out in its second edition in September.  Thanks for asking