The author is a lawyer in the united states who has practiced American visa and immgration law for eigteen years. His clients come from all over the world.Mr. Cohen has successfully handled visa and immigration applications for some of the largest international companies, and for many small firm, numrous individual bussiness people and investor and for many proffesional.University in New York, and the new york university School of law. He lectures in immigration law in America and abroad and this book is published in more thab twenty countries.