I also realised, when one of my characters suddenly got completely out of hand and decided to return to India, that I was woefully ignorant of Indian culture. I knew some from reading and I had, in fact, studied Indian history at university, but I had no idea whether my knowledge would suffice for modern day India. The problem with something like that is you don’t know what it is that you don’t know. I did not realise, for example, that a Hindu would be unlikely to understand Urdu. So I appealed on Twitter for experts on Hindu culture to read and correct it. I had four responses and checked all their comments with Google. Thank you, you wonderful people. You’ve saved me a lot of embarrassment. And thank you, Google. You saved me weeks of work.