This was the first Chris Ryan book that I'd read. In this short story the character of Danny Black is a lone wolf on an unofficial mission. In this teaser novel between the second and third books in the series the reader is exposed to lots of action crammed into just over 100 pages. The story can be read standalone but it hints to a bigger story. This story is explored in the other paperbacks in the Danny Black series.
Ryan writes fairly simply. He's direct and to the point. This doesn't mean that the book isn't gripping. Nor does it mean the book lacks detail. Ryan's technical descriptions help give the far-fetched tale an air of plausibility and authenticity.
So, in summary I'd be happy to pick up another Chris Ryan novel. They are easy to read and hard to put down, especially if you love non-stop gruelling action.