Aquaman Volume 4: Death of a King
Aquaman is a series some critics claimed was the only good thing to come from the New 52 (it's not, but more on that later). Thankfully, the Death of a King storyline is another excellent example of why that's so widely believed. In the wake of Volume 3's Atlantean invasion, Aquaman has finally ended his self-imposed exile and accepted his birthright as the king of Atlantis.
Unfortunately, the transition isn't a smooth one; Aquaman's new subjects don't trust him fully, and now he must defend Atlantis from simultaneous political and physical threats. Humans are scavenging and selling Atlantean weapons, Ocean Master's trial is inspiring rebellion, and an ancient being has returned to challenge Aquaman's rule. Each of these events could warrant their own storyline, but somehow Death of a King balances it all and throws in two separate attacks on Atlantis for good measure. It's hard to imagine Geoff Johns and Paul Pelletier to top this, but after reaching the last page you'll want to keep following the series to find out.