Jorge Sa, PhD, Columbia University, Jean Monnet Chair, is an expert on P. Drucker and P. Kotler, founders of modern management and marketing, who recommended his books published in twelve languages. His hobbies are soccer (he holds a professional degree as coach), and travel (speaking fluently English, French, German, Portuguese and Spanish). Magda Pereira has an undergraduate degree in Management by ISEG School of Economics & Management and she is the general manager at Vasconcellos e Sa Associates. Magda has co-authored books with Professor Jorge Sa and has also managed many consultancy projects for Vasconcellos e Sa Associates. Nadiia Nikitina has her master's degree in Chemistry by Vasyl' Stus Donetsk National University and an undergraduate degree in Ecology by the Volodymyr Dahl East Ukrainian National University. She is a director at Vasconcellos e Sa Associates and has co-authored books with Professor Jorge Sa.