I've been slowly teaching myself the basics of cooking Indian food. I'm a little confused about recipes that call for curry power. I am of the impression that it is somewhat of a faux pas in Indian food, and that traditionally masala is used. Additionally, I believe that most curry powders are an arbitrary blend of tumeric, cumin, and ginger. So my question is how do you substitute for curry power. Should you substitute an equal amount of garam masla, or should you just add slightly more of your other spices?
Also there doesn't seem to much in the way of good blogs that focus on Indian cooking. Any recommended websites or cookbooks?