It's the sequel to their 2008 graphic novel about a ragtag group of heroes on Mars in the year 3535. Here's the description of the sequel: "Hearts will be broken, moons will be destroyed and hooch will flow in zero gravity in this sci-fi romantic action comedy set in the year 3535. When someone, or something, starts kidnapping the children of Mars, the planet’s most notorious outlaws band together to rescue them. Off world, out numbered and falling apart from within can the Martian Confederates discover the secret of Phobos before they destroy each other? And does what 'happen in space, stay in space?'"
You can find it in Previews under order code 101040; the 150-page graphic novel costs $15. Check out a huge 25-page preview of it after the jump.