Well, to reach all those people out there who have not heard of it, the agency droga5 has come up with some great marketing ways.
They basically printed passages or sentences from the book on the bottom of a pool, on a car or on a table-cloth in a restaurant.
In my opinion, this is a great way to adress the target group not just visually, but also emotionally. I hope some other authors or companys will pick this idea up and maybe even develop it further.
via ignant where I also got the pictures from