Apart from the generic hollowness, what kinda setting is this? Zombies? Robots? Ufos? Ghosts? all of them?
It's Scooby Do, Buffy, Kolchack the Night Stalker, Ghostbusters, Cthulhu etc. "modern day monster hunting and occult investigations" from the back of the book.
Zombies and Ghosts definitely, but robots and UFOs could work.
The Dark Spawn classes listed in the book are:
Restless - undead, zombies, ghosts, vampires etc
Possessed - creatures operating under a malign influence
Cursed - were-creatures, shapeshifters
Damned - creatures from Hell
Others - Cthulhu type beings
Shoe-horning edge cases in shouldn't be too hard
I agree about the lack of in-game images, but the artwork has grown on me.