When Professor Dirac was at Florida State University he wrote a book. (If you don’t know who he was, he was 0ne of the great geniuses of the twentieth century. He was awarded the 1933 Nobel Prize in physics)
When the first copies were delivered to the Physics department, I grabbed the first book and cornered Professor Dirac in the elevator. I said “Would you please sign my book, Professor Dirac?” He was confused. Then I said “I would like your autograph”, and then he understood. He was so very unassuming.