After we saw a poster with a picture of Matthieu Ricard at the Swiss Federal Institute of Technology in Zurich Hönggerberg, we became interested in Matthieu Ricard, his books, and in gamma waves. We have read Matthieu Ricards book Happiness and Meditation, and we have read Richard Davidson paper in PNAS: https://pubmed.ncbi.nlm.nih.gov/15534199/ Matthieu Ricards books …