King City by Brandon Graham

King City : Paperback : Image Comics : 9781607065104 : 160706510X : 20 Mar 2012 : Joe is a catmaster, trained to use his cat as any tool or weapon. His best friend, Pete, falls in love with an alien he's forced to sell into green slavery, while his ex, Anna, watches her Xombie War veteran boyfriend turn into the drug he's addicted to.