Some clarity on Print on Demand (POD):

"Highest profits are usually generated from sales direct from the print-on-demand service's website or by buying copies from the service at a discount, as the publisher, and then selling them yourself. Lowest commission usually come from sales from "bricks and mortar" bookshops, with on-line bookstores falling somewhere in between."

According to the newtonian perspective, there are three points of intervention where a message can become more useful to a market.

First is the arena within which the message occurs when the reader first sees it.
Second is the arena where the reader absorbs the material of the message.
Third is the processes whereby they form an understanding of the message.

The realities of text and image alter depending on which point of view you take. The tipping point folk will focus on 'stickiness', being able to make the medium more attractive (option one). The design audience will seek to engage the reader on various contexts, using the devices of marketing and graphic design, simple appeals to egotism and vanity that take advantage of the perceptual limits of this.

Then, the third time, will align themselves with the thought processes of the reader him or herself, thus engaging the understanding at the source. An example of this third type is skillful means in Buddhism. It is also the outgrowth of the character of the person doing it that makes these messages so enormously powerful... they simply cannot be faked, because they rely on an alliance with the fundamental thought processes of human understand. One can only pervert these thought processes by perverting one's own mind. This the ground zero of excellence, at the place where the invisible realm of the incomprehensible suddenly appears and becomes comprehensible.