Soul of the Hunter, the sequel to the legendary Kraven's Last Hunt, is nothing more than a cheap way for Marvel to both market off its predecessor's success while simultaneously condemning its dark themes. As a sequel to one of the best Spider-Man stories ever told, people were bound to pick this one-shot up to see how the story continues. It worked, because I bought into it. Additionally, since the ending to Kraven's Last Hunt was so dark and depressing, Marvel felt the need to appease the upset parents whose children had just read a comic book involving real-life themes such as death and insanity. So in case you were too dim to know this on your own, Soul of the Hunter sought to inform its readers that suicide is, in fact, very bad and should not be looked at as being honorable. Gee, what a revolutionary thought, thanks for sharing that!
So here's the basic plot: Kraven's cursed soul haunts Spidey into somehow rescuing him from eternal suffering because of his actions in Kraven's Last Hunt. What a way to ruin such a cool villain. Basically, take what made Kraven so imposing, dangerous, and worthy an adversary to Spider-Man, then strip it all away and leave behind nothing more than a pathetic husk of the character we just got to know in the last graphic novel. Way to go, you made Kraven a top five best Spidey villain into an absurdly mediocre one. Definitely not a necessary sequel in the least, especially considering how excellent its predecessor was by comparison.
I did kind of appreciate how Spider-Man came to terms with the fact that he can't possibly save everyone, Kraven included; it's a harsh reality that our hero has to face as part of his character development. Regardless, this one-shot isn't worth reading for that modicum of character development alone. You're far better off pretending that this thing doesn't exist – trust me.
A word of advice: if a great graphic novel has a sequel or prequel, it's probably not going to be as good as the original off of which it was based. Prequels like Before Watchmen, and sequels like The Dark Knight Strikes Again serve as prime examples on when to quit while you're ahead. You can add Soul of the Hunter to that list, because Kraven's Last Hunt was better off being a stand-alone graphic novel without a sequel to taint its legacy.