From August 23-27, 2021 I taught at the 25th Summer School in Social Science Methods, organized by the Swiss Foundation for Social Science (FORS) and the Università della Svizzera Italiana (USI). The summer school is hosted at USI in beautiful Lugano, Switzerland. This was the third time that I offered a one-week intensive course on Qualitative Comparative Analysis (QCA) at the Swiss Summer School in Lugano (after 2016 and 2019, respectively). The course was offered in hybrid format, with in-presence and online participants attending the course. The course was based on my QCA textbook Qualitative Comparative Analysis: An Introduction to Research Design and Application, published with Georgetown University Press (2021, Publisher’s Website). Many thanks to all course participants for an intensive and fun week with QCA! And thanks to School Coordinator Janice Casarella and the School Directors Eugène Horber, Patrick Gagliardini, and Benedetto Lepori for the excellent and smooth organization!