「紙の本とデジタル媒体の最大の差は影響する時間の長さだ。ツイッターはつぶやいて１時間、フェイスブックは１日、ブログでも１週間たてば、もう反響はほとんどなくなる。ところが、本は１ヶ月目からが勝負、１年、２年と反響が続き、グーテンベルグらのインキュナブラが実証しているように500年間影響を持ち続ける。反面デジタルの伝播力は紙に比べ猛烈に速い。紙は追いつけない。

　伝播速度と情報の持続、この特性に応じてデジタルと紙を組み合わせることに新たなビジネスチャンスがありそうだ。そここそが「紙の復権」のスイートスポット。どうやってデジタルと紙を組み合わせるのかを問うことこそ、これからの印刷人の勝負どころだ」

Laura Dave creates and discusses a music playlist for her novel The First Husband.

via https://twitter.com/MJ_Coren/status/205158938902134784 "how big is the adoption of e-books today?

Mike Shatzkin: I would say that for the big publishers, for what I call immersive reading, which is to say not illustrated books but books where you start on page one and read to the last page, we are in the mid-thirty percent. So out of a hundred thousand copies of a new hard cover they’re going to sell sixty-five thousand print books and thirty-five thousand e-books. But it’s fifty percent for fiction and twenty-five percent of non-fiction."

"Summary taken from G. Polya, "How to Solve It", 2nd ed., Princeton University Press, 1957, ISBN 0-691-08097-6.
UNDERSTANDING THE PROBLEM
First. You have to understand the problem.
What is the unknown? What are the data? What is the condition?
Is it possible to satisfy the condition? Is the condition sufficient to determine the unknown? Or is it insufficient? Or redundant? Or contradictory?
Draw a figure. Introduce suitable notation.
Separate the various parts of the condition. Can you write them down?
DEVISING A PLAN
Second. Find the connection between the data and the unknown. You may be obliged to consider auxiliary problems if an immediate connection cannot be found. You should obtain eventually a plan of the solution.
Have you seen it before? Or have you seen the same problem in a slightly different form?
Do you know a related problem? Do you know a theorem that could be useful?
Look at the unknown! And try to think of a familiar problem having the same or a similar unknown.
Here is a problem related to yours and solved before. Could you use it? Could you use its result? Could you use its method? Should you introduce some auxiliary element in order to make its use possible?
Could you restate the problem? Could you restate it still differently? Go back to definitions.
If you cannot solve the proposed problem try to solve first some related problem. Could you imagine a more accessible related problem? A more general problem? A more special problem? An analogous problem? Could you solve a part of the problem? Keep only a part of the condition, drop the other part; how far is the unknown then determined, how can it vary? Could you derive something useful from the data? Could you think of other data appropriate to determine the unknown? Could you change the unknown or data, or both if necessary, so that the new unknown and the new data are nearer to each other?
Did you use all the data? Did you use the whole condition? Have you taken into account all essential notions involved in the problem?
CARRYING OUT THE PLAN
Third. Carry out your plan.
Carrying out your plan of the solution, check each step. Can you see clearly that the step is correct? Can you prove that it is correct?
Looking Back
Fourth. Examine the solution obtained.
Can you check the result? Can you check the argument?
Can you derive the solution differently? Can you see it at a glance?
Can you use the result, or the method, for some other problem?"