Conversations with Karel on the Most Essential Element of Life is literally just that: a conversation on there very oxygen that you need to survive. But then, it's so much more than that, too. Because Oxygen is only 20% of the atmosphere, but you die without it. Too much and you die, too little and you die. Conversations with Karel on the Most Essential Element of Life makes you think about all the things in your world that you give oxygen to on a daily basis. That means you are breathing life in to them, literally. What are these things? Do the warrant the life?