Jim Keogh is on the faculty of Columbia University and Saint Peter's College in Jersey City, New Jersey. He developed the e-commerce track at Columbia University. Keogh has spent decades developing applications for major Wall Street corporations and is the author of more than 60 books, including J2EE: The Complete Reference, Java Demystified, ASP.NET Demystified, Data Structures Demystified, and others in the Demystified series.
Ken Davidson is a Columbia University faculty member in the computer science department. In addition to teaching, Davidson develops applications for major corporations in both Java and C++.