A Dark So Deadly by Stuart MacBride (Second-Hand)

Welcome to the Misfit Mob ... It's where Police Scotland dumps the officers it can't get rid of, but wants to: the outcasts, the troublemakers, the compromised. Officers like DC Callum MacGregor, lumbered with all the boring go-nowhere cases. So when an ancient mummy turns up at the Oldcastle tip, it's his job to find out which museum it's been stolen from. But then Callum uncovers links between his ancient corpse and three missing young men, and life starts to get a lot more interesting. O Division's Major Investigation Teams already have more cases than they can cope with, so, against everyone's better judgement, the Misfit Mob are just going to have to manage this one on their own. No one expects them to succeed, but right now they're the only thing standing between the killer's victims and a slow, lingering death. The question is, can they prove everyone wrong before he strikes again?