Douglas Downing is an economics and statistics professor at Seattle Pacific University. He wrote Algebra, Trigonometry, Calculus, and Java Programming for the E-Z series, as well as Dictionary of Mathematical Words and Dictionary of Computer and Internet Terms (all with Michael and Melody Covington). He is a Ph.D. holder. Yale University awarded him a bachelor's degree in economics. Manuel H. Martin was a publisher in the 1930s.
In Brooklyn, New York, Barron opened a bookstore. Residents inquired about publications that might be available to assist their children in studying for the New York State Regents tests. Barron's built his own study guides after realizing there wasn't anything accessible. Barron's has helped millions of people plan for their next move for the past 80 years.