Also, though, it's a really interesting text in terms of colonial literature, in that it's a very nuanced exploration of racial and nationalistic attitudes in South Africa before the Second World War. In that, it's a valuable text for any student of race, post/colonialism, etc.
All that said, it's not an amazing novel. It's nowhere near as brilliant as The Good Terrorist, which I maintain is absolute genius. The plot line is fairly bland, and it trails off rather suddenly at the end - though it's part of a series, as I understand, so perhaps it's meant to encourage you to pick up the next one. But in any case, it's not a magisterial book so much as a rather brilliant character study.