I bought this paper book for $2.00 only. (The Timetables of History) Third edition for the history of 4500 BC to the 1990's.
"A Horizontal Linkage of People and Events"
724 pages. "By Bernard Grum, based upon Werner Stein's Kulturfahrplan."
In the library of my town they selling many paper books for really cheap. Hmm? But this book is really helps me to understand time, and what happened in the world in time.
But it look like in the the developed countries, paper books is not important for the future.