Irv Kalb is an adjunct professor at UCSC-Extension and University of Silicon Valley (formerly Cogswell College), where he teaches introductory and object-oriented programming courses in Python. Kalb has a bachelor's and master's degree in Computer Science, decades of experience developing software while focusing on educational software, and has been teaching for over 10 years. He is the author of Learn to Program with Python 3: A Step-by-Step Guide to Programming (Apress).