Ive mailed the author of this new balti book thats coming out and it sounds quite promising, restaurants use pastes in a number of recipes (if anyone tells u different then they are lying! so if you get a book that doesnt mention pataks pastes in a tikka or sheek kebab recipe then you know its crap!) the author got back to me and confirmed that these pastes are in the recipes (certain starters but not actual baltis/curry sauce) and that the recipes are the ones used by the chef. I am quite optimistic about this book, this might be the one!