I do love a Derek Adams story - there ought to be more of them *cough, hint*. Full of clever clues and references, overlaid with smoke and whisky, smothered in the seedy, inner Glasgow of our author's memory, and draped in a darkly humorous noir overtone; this is yet another brilliant tale of what happens when our favourite PI says Yes to a job.
Before you know what's going on we have mysterious deaths, magical powers afoot and some violent beasties intent on revenge (and lunch). There's some excellent history by way of a Journal, and a hint of the legacy of the item Derek's taken ownership of. Needless to say, the troubles are very old, and Derek's return to the notes during the tale illuminates several clues - although our hero tends to be focusing on where his next breath (or cigarette) is coming from rather than whodunnit and why. Whodunnit is usually in hot pursuit anyway...
With the aid of his allies and contacts in the less official regions of society; Derek follows the trail to Canada, where yet more strangeness abounds and he finds himself trussed up in a shed with a bunch of confused Goths and a lot of howling (I won't ruin it with much more - this ought to pique your curiosity sufficiently).
Another great adventure!