The CG Challenges, run on CGNetworks.com and the CGTalk.com forums, are testament to the desire of digital artists to better their skills and prove their mettle to peers. To capture the efforts of the CG community in a medium that will survive beyond their Web beginnings, Ballistic Publishing presents Machineflesh, the first in the series of CG Challenge books that will document the online Challenges with a mix of techniques and galleries of images.