The Success Series By Dale Carnegie :

For over a century, Dale Carnegie has been improving individual and business performance around the world. His books have been training people seeking real transformation and impactful results. Dale Carnegie is a well-known master of people skills. That's why, inspired by his precise and practiced methods, and fine-tuned over decades, these books are specifically designed to transform individuals into capable professionals who are highly skilled in interpersonal communications. This 5 volume boxed-set is both timeless and timely.