About the Author

Michael Hartl (https://www.michaelhartl.com/) is the creator of the Ruby on Rails Tutorial (https://www.railstutorial.org/), one of the leading introductions to web development, and is cofounder and principal author at Learn Enough (https://www.learnenough.com/). Previously, he was a physics instructor at the California Institute of Technology (Caltech), where he received a Lifetime Achievement Award for Excellence in Teaching. He is a graduate of Harvard College, has a Ph.D. in Physics from Caltech, and is an alumnus of the Y Combinator entrepreneur program.