One syllable, no subtitle, no softening: Grim is the kind of title that fixes the temperature before anything else happens. The catalogue attaches it to The Lost Souls Chronicles, and Joe Arden reaches our shelves through it, filed at once under crime and thriller, general fiction and romance.
That triple shelving is worth pausing on, because it describes the book more accurately than any single label could. Romance with a body count, or crime with a heart at stake, depending on which end you approach it from. Eleven and a half hours gives both halves the space they need, which is usually the difference between a genuine hybrid and a thriller with a love interest bolted on afterwards.