This is a remarkable book. Those who have read some of Ghosh's other books will know that he has a talent for combining impressive knowledge of history and a wide range of other subjects with very readable narrative and well-defined characters. All of this is present within this book, along with a hefty dose of sci-fi and thriller.
The story is incredibly imaginative and has some complex and facinating ideas in it. I won't reveal too much, as I think part of the joy of the book is finding out things as the story goes on, but the plot centres around the man who discovered how malaria is transmitted, Ronald Ross. One of the main characters, Murugan, is a huge Ross enthusiast, and devotes much of his life to studying the great man's work. But then he discovers something far more intriguing that puts him in danger of knowing too much...
My only problem with the book is that I thought the ending was a little muddled, and I was left with a vague idea of what had happened but was still bit fuzzy about some points. However, I still very much enjoyed reading it, and hopefully a re-read might make things a bit clearer!