The book "Understanding Media: The Extensions of Man" by Marshall McLuhan

"Understanding Media: The Extensions of Man" by Marshall McLuhan explores how different forms of media—like print, television, and the internet—shape human perception and society. McLuhan introduces the idea that media are extensions of our senses and bodies, influencing how we think, feel, and interact. He highlights that each medium affects us differently—some heighten our senses (hot media), others engage us more fully (cool media). His famous phrase, "the medium is the message," emphasizes that the form of a medium has a profound impact, often more than content itself, transforming culture and social dynamics.