Working in the software industry for over 15 years, I've been always passionate about how to improve the code. I realized that the knowledge about how to implement a piece of functionality is only a small part of what makes a developer a good developer.
I researched the topic and the result was a book, "Coding in style" that tries to prove that even a small effort in improving the code can bring huge benefits.
I created a series of YouTube videos on this topic as well.
A course has just been a natural continuation of this efforts.