Over five years, a single sketch book was passed between 72 artists spread throughout the world. The original book was auctioned off for charity, raising almost $100,000. Sketchtravel is a beautiful reproduction of the art as well as photographs of all of the participating artists.
Some of the art adheres to the original concept - - sketches that incorporate an image of the sketch book itself:
But over time, with one notable exception:
The art became more and more ornate:
Many of the artists chose to respond to previous illustrations, such as Lou Romano's contribution making a cameo in Dominique Bertail's surreal painting:
It's a wonderful book, and currently 40% off at Amazon. You can see more at the official site and companion blog.