How to Win Friends and Influence People is a self-help book written by Dale Carnegie, published in 1936. Over 15 million copies have been sold world-wide, making it one of the best-selling books of all time. In 2011, it was number 19 on Time Magazine's list of the 100 most influential books.
In 1934, Leon Shimkin of the publishing firm Simon & Schuster took one of Carnegie's 14-week courses; afterward, Shimkin persuaded Carnegie to let a stenographer take notes from the course to be revised for publication. The book sold exceptionally well from the start, going through 17 editions in its first year alone.
In 1981, a revised edition containing updated language and anecdotes was released. The revised edition reduced the number of sections from six to four, eliminating sections on effective business letters and improving marital satisfaction.
In 2011, a third edition was released, How to Win Friends and Influence People in the Digital Age. Written by Dale Carnegie & Associates, it applies Carnegie's prescription for relationship and business success to the digital age.