I've always wanted to write a book about an English boy who moves to/lives in India, his father working for the East India Company. The book will be set in late 18th/early 19th century Bengal, and revolve around the boys experiences with Opium. Throughout the book, the boy will experience a number of supernatural experiences, experiences which he cannot decide are part of reality, or the result of the drug.

Yeah, its all a bit vague at the minute, but what I'm here to ask is if you know of any books you think are a similar sort of theme? That 18th/19th century empire adventure for boys type book, and/or books that accurately describe spiralling heroin/drug use. My history knowledge is a at a decent level, I have a degree in it for what little that is worth, my drug knowledge is somewhat lacking.