Download or read book Invincible Vol. 15 written by Robert Kirkman and published by Image Comics. This book was released on 2012-01-11 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collects INVINCIBLE #79-84, plus bonus materials! Mark Grayson finds himself at a crossroads: Is fighting battles head-on always the best solution to the world's greatest threats, or is there a better way?