War! Volume 4 of the Teenage Mutant Ninja Turtles Ultimate Collection brings the start of a major Turtles storyline: 'City at War!' As the Foot regroup and NYC burns, the Turtles try to find their place in the world. Starting with the two-part 'Shades of Gray,' get ready to enjoy Eastman and Laird's final TMNT collaboration masterpiece as the multi-part 'City at War' explodes onto the comics page!