Seven years in the making, Cain's book, Quiet: The Power of Introverts in a World That Can't Stop Talking was published January 24, 2012.
Setelah tujuh tahun ditulis, buku Cain yang berjudul Quiet: The Power of Introverts in a World That Can't Stop Talking diterbitkan pada tanggal 24 Januari 2012.