Download or read book Invincible #91 written by Robert Kirkman and published by Image Comics. This book was released on 2012-05-09 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The new Invincible will not back down, will not give in, and he is not going to play nice. What happens when Mark Grayson isn't happy with his replacement? All this and...What exactly happened between Robot and Monster Girl in the Flaxan Dimension?