More than 100 illustrators, cartoonists and street artists collaborated together under one project called Outside the lines. The book is a compilation of incredibly creative coloring pages for all ages. But, I guess, the ones who are into contemporary art, will appreciate it more.
Curator of the project Souris Hong-Porretta spent around 3 years on accomplishing the final copy. The result is brilliant. Going through few examples below will really itch your hands to color them!
[Source: My Modern Met]