I remember learning about the black hole of Calcutta in school (good old Mr Purton again) so I'm the right age to appreciate this book (first published in 2007). The book is nicely enough written by a skilled journalist who tells you more than you ever wanted to know about the subject and just about keeping your interest for the whole 213 pages. Frustratingly, details of the story will always be a little hazy but the book at least demonstrates that and gets as near to the truth as anyone is likely to. It also gives you, in addition, a partial history of Empire, which is not what one might have thought and an example of the power and importance of myth or whatever we should call it. Fascinating stuff if you want to get to the bottom of the black hole, as it were.