UDON Entertainment is publishing an art book made up of community-created artwork called World of Warcraft Tribute and it is now available for preorder. A year and a half ago, Blizzard asked for professional and fan artists to submit art inspired by Azeroth and this is the result. The book has 200 illustrations from international artists. Also included are commemorative pieces from Blizzard artists Arnold Tsang and Samwise Didier.
There is a nine page preview over at UDON's website. If you wish to preorder, the preview includes links for preordering from both Amazon, Barnes and Noble, and other retail sites.