An 85-year-old book doubled my salary.
I managed to double my income over the course of two years, the principles of a single book had a major part to play in my story, and hopefully yours. Dale Carnegie’s best seller is ageing finer than French cheese. Almost 85 years after its first publication, this treasure of a book is crammed cover-to-cover with actionable advice and approaches that are so obvious, yet missed all too often. How to Win Friends and Influence People.