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 . An issue used to be published Weekly . This book is of superhero genre . DC Comics published ,The book named Countdown to Final Crisis . This book was published in May 2007 - April 2008 . The book has 51 issues
Countdown to Final Crisis had 55 issues