The world's greatest paranormal, Ghost, uncovers her killer. The protector of Arcadia, X, gets killed. It's the story you've been dying for and it's all right here, in one volume! Beginning with Ghost #20, this deluxe trade paperback takes you up through the revelatory Ghost #25, and if that isn't reason enough to grab it, check out the gorgeous John Bolton cover!
Not read much Ghost but this was under a fiver and well worth the money. Not only does it focus on the characters but the city itself which just adds more to it. Ghost is a cool character, a murdered reporter who comes back to life to seek justice and answers. This arc is already half way through the run but don't let that put you off it draws you into the murky underworld.