An issue used to be published Initially bimonthly, then monthly . It falls in post-apocalyptic category . This book was published in March 2014 – August 2016 . It is a mini-series . Keith Giffen,Brad Meltzerwrote the book Invasion! . The book namedInvasion! was published by Archie Horror . The book has 16 issues . Karate Kidare the main characters of the book
Vertigo Comics,Slave Labor Graphics publishes in mini-series format