Countdown to Final Crisis was 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 . The book has 51 issues . This book was published in May 2007 - April 2008 . It used to be published Weekly . The book namedCountdown to Final Crisis was published by DC Comics . Countdown to Final Crisis is of superhero genre
There are more number of issues than genres