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 . It falls in superhero category . Weekly an issue of this book was published . The no. of issues of the book is 51 . This book was published in May 2007 - April 2008 . The name of the book is Countdown to Final Crisisand it was published by DC Comics
The book has less than 16 characters