Ahrens, Sönke. How to Take Smart Notes: One Simple Technique to Boost Writing, Learning and Thinking. 2017. In this short book, Dr. Sönke Ahrens introduces the Zettelkasten method. Zettelkasten is a German word that means “memo box” or “slip box,” which refers to the knowledge management system established and used by the German sociologist Niklas … Continue reading Ahrens, How to Take Smart Notes (2017)