I started reading Road to Reality very casually– bought the book one day, next day I was in a Starbucks enjoying it and my tea. 10 minutes later one of the employees takes a break and the only table open is next to mine near the back. After a few minutes of sighing, stretching, and looking at the door to see if any new customers were coming in he turned to ask what I was reading. The next 30 minutes was the first and only time I have ever had a discussion about particle physics with a barista.