Download or read book Invincible #20 written by Robert Kirkman and published by Image Comics. This book was released on 2005-01-01 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: For nine years now (or however long it's been since issue #6 came out) readers have been wondering, "What's up with that robot zombie from issue #6?" Well, wonder no longer, because he's in this issue! Mark is on campus at his new college and something is amiss. What lurks behind...oh, wait: You already know!