Invincible #15

Beneath the waves, Invincible finds himself in a tight spot — a fish-headed aquatic warrior has him locked in a grappling hold, bubbles escaping as the young hero struggles in the deep-sea environment rendered in striking blue tones by cover artist Cory Walker. Robert Kirkman, Ryan Ottley, and Bill Crabtree bring their signature energy to this 2004 Image series, with fish and coral framing a confrontation that suggests Mark Grayson's adventures are taking a very unexpected underwater turn. At just $2.95, issue #15 is a vivid reminder of why Invincible was already one of the most compelling superhero books on the stands.