Seymour's thrillers are always about far more than providing thrills. Indeed, if he wasn't labelled 'thriller writer', and if he didn't write books that ordinary people enjoy reading, he'd be in line for all sorts of literary awards. From the accuracy of the settings to the quality of the writing to the intricate plots to the careful balancing of sympathies, he is consistently excellent.
This is his best yet. To arouse sympathy for a committed member of Al-Qaeda who is determined on mass murder and is, moreover, a 'renegade' white Brit might seem both impossible and perverse, but Seymour achieves it without ever suggesting that the 'hero's' path in life is anything but tragically wrong. Equally, he excoriates the crassness of some Americans, and denounces the Guantánamo system, without suggesting that the Islamic terrorist view of life is preferable. Rather he shows how the two evils feed off one another, and how the evil on each side perverts all the goodness in individuals, and yet leaves them as human beings who are often disconcertingly sympathetic.
He also suggests, but without preaching, that Caleb has the makings of a great man - a general, a statesman, an explorer, or all three - but that his potential has been ruined by his upbringing. Illegitimate and unwanted, growing up on a sink estate and decanted into a sink school, he longs to rise above the ordinary, but because all he sees around him is petty crime, his aspirations are naturally channelled towards more-than-petty crime, in fact the greatest of all crimes. Naturally affectionate and hating loneliness, he has no loving family, few friends and only one sympathetic teacher, who can do little for him. No wonder he clings with such determination to the one set of people who test him to the limit and then include and esteem him: his 'family', Al-Qaeda.
This is a disquieting book that makes one question all one's ideas about what makes a terrorist. And the ambiguous ending suggests that the terrorist - the intelligent terrorist, the great man gone wrong - is still among us. We made him, we deserve him, and we have no defence against him.
It's also a palpitatingly exciting read. What more can you ask for?