THE ASSASSIN ON THE BANGKOK EXPRESS is the second book in a series sub-titled "The Honourable Assassin", the first (with that title) released in 2015. Set, needless to say in Asia, they feature Vic Cavalier as the central protagonist. Cavalier is a newspaper reporter and freelance secret agent, with a long history of working in Asia. Long enough to have a daughter with his now ex-wife, a Thai doctor, his daughter having been kidnapped by the head of a Mexican Drug cartel with tendrils into Thailand, and Bangkok in particular.
If you've not read the first book there's enough back story in BANGKOK EXPRESS to give you an idea of the lead up - helped in the ebook version by an extensive walk through of the action from THE HONOURABLE ASSASSIN at the start.
Cavalier has an unusual set up, journalist and freelance secret agent isn't a combination that has a precedent as far as this reader can remember, so that might take a while to get used to. As will the style of the storytelling which is formal, particularly when it comes to dialogue which is precise, detailed and not always convincing as conversational. This was frequently unfortunate as the action is reasonably well paced, and whilst the plot is complicated and will require some suspension of disbelief, overall it's quite compelling.
The novel does, however, transmit great authority when it comes to the setting. There's a palpable sense of place and culture, right down to scenery, weather and people's day to day behaviour. There's nice insight into the ex-pat life in Bangkok and a brave undertaking in making Cavalier reactions to his ex-wife (a complicated woman battling mental illness) not always consistent or sympathetic.
That sense of place, and the complications that drug wars bring to communities struggling with poverty are strong aspects to this novel, and readers who aren't bothered by the slightly old-fashioned, mannered way of relating a current day plot may find THE ASSASSIN ON THE BANGKOK EXPRESS an enthralling prospect.