I highly recommend this 10 week on line course for anyone interested in Marshall McLuhan's book Understanding Media that he wrote in 1964. It was as timeless then as it is today. I took the course during COVID when Andrew first offered it. His teaching style and delivery is wonderful, he's a natural teacher like his father Eric and grandfather Marshall McLuhan.
https://grayarea.org/course/andrew-mcluhan-teaches-understanding-media-intensive-part-one-2024/