Download or read book Invincible #56 written by Robert Kirkman and published by Image Comics. This book was released on 2008-12-10 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: When someone very close to Invincible is hurt " the gloves come off! Is Mark Grayson's murderous Viltrumite heritage finally coming to the forefront? Find out in this special stand-alone issue that answers the question once and for all: can Invincible be driven to MURDER?