"All About Braising: The Art of Uncomplicated Cooking" by Molly Stevens is my current favorite cookbook.
I hate cookbooks where you follow the recipe exactly and the outcome is bland or just not worth eating for whatever reason. If I'm going to spend time cooking, I want something that tastes delicious! This cookbook does that for me. I'm guessing you want recipes that turn out great, too.
Now, braising is a slow cooking technique - hours in the oven or (if you have to) a crock pot. But the prep time doesn't necessarily take a long time (depends on the recipe.) And most of the recipes freeze well so if you cook once, you probably get at least a couple of meals for your efforts. And while it's in the oven, you can go back to studying.
All the ingredients are ones you can find in your local grocery stores, nothing too exotic, and the recipes make meals that will make you very popular if you have your friends over for dinner. Best of all, if you are a novice cook like me, you will find the recipes easy to do and forgiving of small errors. (Onions not quite perfectly cut in even chunks? Cooked it half an hour too long? No problem, still comes out delicious.)
Admittedly, this is not an all-purpose cookbook, but I love this cookbook so much I have given it to friends and family members. I've never done that with any other cookbook. I think you will be very pleased with this cookbook if you get it.