A kindle e-book reader is pictured at the Book Fair in Frankfurt, Germany, October 15, 2015. AFP PHOTO / DANIEL ROLAND (Photo credit should read DANIEL ROLAND/AFP/Getty Images)
A kindle e-book reader is pictured at the Book Fair in Frankfurt, Germany, October 15, 2015. AFP PHOTO / DANIEL ROLAND (Photo credit should read DANIEL ROLAND/AFP/Getty Images)