By far the book every Marvel fan should have at the top of their reading list before next April, Jim Starlin and George Perez's Infinity Gauntlet arc serves as the inspiration to the upcoming Infinity War, at least on a base level.
Focussing on the Mad Titan as he attempts to win the affections of Death herself, Thanos takes control of the Infinity Gauntlet and promptly eradicates half the sentient life in the universe. Big name heroes perish in an instant, and it's left to Doctor Strange, Spider-Man, Nebula, Adam Warlock and the rest to bring him down. It has time travel, action, drama and death, and stands today as the most epic Marvel tale ever told.
We know not yet just how much of the book Infinity War will adapt, but it seems to be inheriting its ethos quite unashamedly. If the grave inflections of that recent trailer didn't already convey the gravity of the threat at hand, then the film's release surely will, as we're sure to be in for a death - or two - along the way.
As for the book itself, it has everything a cosmic Marvel fan could want, and a brilliant ending that sets up yet another seminal storyline (Infinity War), in its wake.