More than 500,000 copies are in print, including translations in eight languages. Author received letters and emails from readers as young as 10, as well as from retirees who want to learn to program in their free time. Python crash course is being used in middle schools and high schools, and also in colleges. Students who are assigned more advanced textbooks are using Python Crash Course as a companion text for their classes and finding it a worthwhile supplement. People are using it to enhance their skills on the job and to start working on their own side projects. In short people are using the book for full range of purposes author had hoped they would.