June 23, 2011
The basic premise of this three-issue miniseries is actually pretty simple: Swamp Thing, a green elemental creature with magical powers that has been missing for many years, appears to have returned to Earth. Rather than the old benevolent Swamp Thing, this new incarnation appears to be destructive and potentially very dangerous. English magician John Constantine heads off on Swamp Thing's trail, hoping to track down his former friend and find out what has gone wrong. On his way he begins to encounter a group of superheroes including Batman and fellow magician (and, it turns out, ex-girlfriend) Zatanna.
June 20, 2011
Of course, it's often hard when you want to simply buy a single issue of a comic book to find one that's going to be self-contained. It's a serialised medium, and so finding a single comic book with a beginning, middle and end is often rather tricky.
In the end I went with Giant-Size Atom #1. I've always liked the Atom (aka Ray Palmer), and this purported to be an extra-length 'one-shot' guest-starring Hawkman, who I also rather like. (A one-shot is, rather obviously, a single issue self-contained comic book with a beginning, middle and end.) The comic was written by Jeff Lemiere, whose previous work I have not read but whose solid reputation has preceded him.