GP stands for Gomez Porter, the hero (so to speak) of this very engaging short novel, and it also stands for guinea pig. It is not giving the plot away to say that Gomez, the feckless owner of a struggling little antiques business, volunteers for a programme of testing unspecified drugs just to help pay his bills. This turns out to be dangerous, but the danger is not what Gomez expected it to be, nor what I expected it to be either, and I would be rather surprised if many readers guess the outcome correctly. This is an attractive story in a number of ways, one of these being how neatly the plot is worked out. GP also stands, quite obviously, for Graham Parke, the book's author, and while this is obviously not coincidence I have no idea exactly what link we are supposed to read into the identical initials.
Participants in the drug trial are asked to keep a blog of their experiences with it, and that gives the author a convenient device for allowing his modest hero to open his heart to us. Gomez is a rather endearing creation, or so I found, and the background of his somnolent little business is described with both affection and witty irony. The situation that he stumbles into makes for some good detective-mystery material, but even when Gomez is briefly in imminent peril of his life the writing keeps its light touch and the reader is not harrowed or kept in any great degree of suspense.
I gather that this is a debut novel, and if so it is a very promising one. Whether Gomez Porter is going to come back to us in some subsequent series I don't know. I find it hard to imagine him cast in any such role, but Graham Parke's imagination is no doubt more creative than mine is, so I shall be interested to see what follows.