15. 纸书 VS 电子书 (ebook)
American Association of Publishers
Monthly Sales Growth/Decline Year over Year
100%
80%
60%
40%
Ebooks only
All book sales
20%
0%
Jan- Feb- Mar- Apr- May- Jun- Jul- Aug- Sep- Oct- Nov-
-20% 08 08 08 08 08 08 08 08 08 08 08
-40%
The Rise of Ebooks, Mark Coker etc