Somehow I managed to read book XIII before this, but it did prove that is isn't entirely necessary to read the Metellus novels in sequence. JMR delivers another cracking read with Decius' tenure as praetor peregrinus leading him to travel down to Baiae in order to preside over cases involving non-Romans. He's barely there a few seconds when someone starts a fracas between the cult of Hecate and the Apollonian temple priests resulting in the latter either being tossed into the river "Styx" - a tourist attraction - or neatly laid out in hidden crypts for aspiring forensic sleuths to casually pore over. Whilst Caesar is the talk of the Roman Senate as he ventures towards the Rubicon, Decius has his own stream to leap over as he tries to figure out the history of cults and temples in this normally affluent holiday-spot.
Throughout, Decius exudes an exasperation at having to deal with knee-jerking aggrandisement as everyone points the metaphorical finger at everyone else whilst trying to stay cool in the blistering heat. Julia aids him immeasurably as she is fully aware of the prevalence of cults and soothsayers abounding in the countryside - a thread continued in SPQR XIII - because our murderer(s) start picking off potential witnesses one by one. Side trips to Stabiae means Decius is forced to glean most of his information at the trinculum of various wealthy Romans, who later wind up dead. Trouble is, sifting through after-dinner conversations where people have their own power games to play and the truth is safely hidden behind an inch thick layer of mendacity, means that whilst we are vaguely aware of why this is happening, to pinpoint actual culprits is an entirely different matter. Decius has another problem in that he's under a constant harangue by pseudo-haruspices or bored Roman aristocrats who then get themselves killed. As Decius bemoans "legality is about the last thing I expect to encounter in this Gordian knot of a case".
Still, the denouement befits a praetor peregrinus leaving Decius happy to saunter off to Sicily and this reader satisfied at the formula of JMR - neaty, tidy, puzzling cases with a likeable sleuth and a motley supporting cast.
There is one aspect of this novel that has grated slightly. It is the first time I've ever really picked up on the jacket but this was difficult to ignore. The painting on the front of this version is pretty poor. Shadows seem to imply the sun is in three different places and the lack of depth from the Temple steps to the cliffs is just wrong. There is no sense of perspective to the bay below. I'm no artist, so it's far better than anything I could produce, but it's pretty poor from a professional. Don't let that stop you buying the book though; it's just JMR needs to have a word with the artist if she's going to do another cover.