An issue used to be published Weekly . Countdown to Final Crisis is of superhero genre . This book was published in May 2007 - April 2008 . The book has 51 issues . The name of the book is Countdown to Final Crisisand it was published by DC Comics . It is a Limited series . The main characters of this book are Darkseid,Donna Troy,Jimmy Olsen,Mary Marvel,Jason Todd,Harley Quinn,Holly Robinson,Karate Kid,Kyle Rayner,Superman-Prime,Monarch,Ray Palmer,Pied Piper,Triplicate Girl,Forager,Trickster,Duela Dent
DC Comics is the publisher of the Countdown to Final Crisis