Hi Ashes -
These are just a few of my favorite reference books :
The Curry Book - Laxmi Khurana
Madhur Jaffrey's Foolproof Indian Cookery
An Indian Housewife's Recipe Book - Laxmi Khu
Madhur Jaffrey Indian Cooking
From Curries to Kebabs : Recipes from the Indian Spice Trail - Madhur Jaffrey
Traditional Indian Curry in a Hurry: Time-sensitive Recipes for Authentic Home-cooked Dishes -
Babita Taneja, Win Dulai
The Complete Asian Cookbook - Charmaine Solomon
The Curry Book : Memorable Flavors and Irresistible Recipes From Around the World -- Nancie McDermot
Curry : Fire and Spice: Over 50 Great Curries from India and Asia
Great Curries of India - Camellia Panjabi
As far as traditional BIR , the best is on this site ( including KD's )
Notice the absence of all of Pat Chapman's publications !
Regards ,
CC