Books like 20th Century Boys

The giant robot has already been built!! And now it was jus waiting for the great awakening... While `Friend` has never been identified as of yet, days pass by moment to moment, counting down to December 31st, 2000... the day when earth sees it''s end. The only ones to save the world are the so-called `nine friends` who''ve written `The Book Of Prophecy` during their childhoods. Will humans ever able to enter a new world save and sound!?