The Furthest Station is a part of the PC Peter Grant series by Ben Aaronovitch, only it’s not a book or a graphic novel, it’s novella! I feared the novella format would be too short to properly enjoy, but that turned out to be a faulty assumption.
Ghosts are not a rare occurrence on the London Underground, but these ghosts are different. They are aggressive and frightening. And it seems these ghost have an urgent message; only they can’t seem to deliver it. Luckily Peter Grant is on the case! He is joined by Nightingale, Jaget Kumar, Toby the ghost hunting dog and his teenage cousin, Abigail, who has been dabbling in magic herself.