One of the reviewers on Amazon complained that this book had little to do with gardening. Good grief! I think Le Carre has made the transition from Cold War spy novels to contemporary issue thrillers quite handsomely. In this book, he really goes after the pharmaceutical companies, accusing them not only of unethical practices using Africans as guinea pigs, but also suggests they would kill anyone whom might deign to challenge their unholy hegemony.
It's also truly a great love story. The relationship of trust and reliance that emerges gradually through the course of the novel between Tessa and Justin is really wonderful. Unusual perhaps; striking, nevertheless.
This is a tale of grand corruption on an international scale but also a celebration (albeit tragic) of the idealistic individual. But I warn you, it's a dark tale.