I know these two have gotten some love on here already, and I'm one of those whose top picks aren't traditional cookbooks. Harold McGee's On Food and Cooking is my constant go-to. Every time I'm trying something new in the kitchen, or even presenting something I know for guests (in short, any meal other than the quick throw-togethers for myself) I go to The Book of Harold on all the techniques and ingredients I'll be using. I've reread so many sections so many times, but checking each one out in the context of the meal to come is always useful. CIA's Pro Chef is another go-to. I'm a big fan of experimentation, and in my dreams everything I cook is some sort of brand-new dish, but there's just no getting around the crucial role of traditional technique. One of my favorites in Pro Chef is the baguette recipe - I've tried maybe a dozen in different bread books, but somehow this one stands out as my favorite. The Flavor Bible is a new edition to my arsenal. I'd be using the tables in "Culinary Artistry" for a long time, so frankly, I was a bit let down by how little new stuff there is in The Flavor Bible for me. That being said, the little bit of extra detail it has can really make a meal. I tend to use both this and Culinary Artistry side by side, less because they're different, and more because skimming through two books for the same thing increases the chances I'll land on a wrong page and end up with a wonderful happy accident.