Tom Friedman first identified the "Bangalore phenomenon" - everything from reading x-rays to legal transcription to computer software development to customer service is happening in Bangalore.

This is the only international business etiquette book for women I can find (other than my own) and it has some excellent information. A bit daunting to try to cover the whole globe in one volume, so the depth suffers a bit. But a good start.

Yes, it's a cookbook, but you'll want it because 1) It has some great culture notes that you won't find in any travel guide or business book on India, and 2) Cuisine is a great window into a culture, and by learning a couple of recipes you'll have things to talk about with people in India! Talking about food is always welcome!

Another excellent guide to doing business in India. Not quite as current as Gunjan Bagla's book, but has different background info.