Devilman vs. Hades / Nagai, G?

"Fudo Akira battled across the broken face of the world to stand against Hades, Emperor of Darkness--and now he finds himself turned into a pawn. Hades strikes a devil's bargain: If Akira destroys his greatest foe, the giant fighting machine Great Mazinger, he will restore Akira's beloved and the world itself to life! It's a battle across time and space for the fate of one man's love--and the future of all mankind"--Back cover.

"Devilman leaves a trail of bodies in his wake, relentlessly carried towards his fateful confrontation with Hades, Emperor of Darkness. The Earth lies in ruins, but its ultimate fate is yet to be decided. And now another player intrudes upon the battlefield: the mighty war machine, Great Mazinger! When these titans clash, the world trembles!"--Front cover.

"When high schooler Fudo Akira merged with the demon Amon, he became Earth's darkest hero: Devilman. The armies of Hell itself trembled at his name. But not even Devilman could stop the end of the world -- nor could he save the women he loved. Now he must descend to the underworld to bring her back. But first he must defeat Hades, the Emperor of Darkness, no matter what the cost"--Back cover.