I borrowed this book from my library many years ago and thoroughly enjoyed it, but can't for the life of me remember what it is called or who the writer is.
It switches between India and England, with two friends. One falls in love with an Indian prince, marries him and moves over to India to discover ... not only is she a 'fish out of water' with the cultural differences, but there's a lot of sinister goings-on.
She feels cut off and suspicious of everyone. There's jealousies galore, and the prospects of political upheavals too.