If you you like like your thrillers set out in a paint (write) by numbers fashion, this will hit the spot. Sometimes I do if, within the book, the story unfolds reasonably and there is good character development.
In 'Assassin' you don't quite get this. When Cain writes the action scenes, the book is the cliched 'page turner', though I'm beginning to despair of Carver, the all-action loner who seems to be caught by the arch criminals as easily as a mouse in a household trap.
It's not that the hero should be invincible but rather, with Carver, the author needs the pain Carver suffers whilst in captivity to build up Carver's strength and character. Frankly, this doesn't work. In fact, it spoils the story as we all know he'll escape with one bound just before the credits roll.
And then there's the dialogue. This is definitely not Cain's strong point. It reads like school playground stuff when dealing with the males and more like a teenager's introduction to the opposite sex where Carver's female friends/lovers/squeezes are concerned. Still, easy reading, entirely forgettable, some really good passages and some quite boring pages, too. There seems to be a trend these days to fill out the chapters with historical events as to why the main protagonists do what they do and this just slows down the main story.
Lee Child has a lot to answer for but, for my money, nobody as yet comes close to this one man against the world of criminals as Jack Reacher and, regrettably, Sam Carver is not a close second.
If you're going on a journey and need a book, take this one with you, read it and then leave it for the next traveller.