I didn't know that Deep Work was a workbook for SGTCIY. In fact, I read Deep Work as a separate book. And I haven't yet read SGTCIY.
If you're interested in improving your productivity by simplifying your work, it is a good book.
But like all self-help books its effect wears off over time.
Keep in mind that Cal Newport is an academic at MIT. He has autonomy, he works in a field he loves etc. For other people his point of view is valuable, but his advice IMHO is not that easy to follow. You may need to improvise and find your own way.
If you're interested in improving your productivity by simplifying your work, it is a good book.
But like all self-help books its effect wears off over time.
Keep in mind that Cal Newport is an academic at MIT. He has autonomy, he works in a field he loves etc. For other people his point of view is valuable, but his advice IMHO is not that easy to follow. You may need to improvise and find your own way.