I already have Flour Pot Cookies and Cookie Craft. 
My daughter found a fabulous cookie book at Barnes/Nobles a couple of years ago. Over 400 cookie recipes. I've got so many post it's in this book, it looks like it's growing feathers! I think it's called "The Biggest Book of Cookies" or something like that.
I like the Joy of Cooking:All about cookies and Joy of Cooking: Christmas cookies books. There are a lot of really good recipes in there!
My favorite of all time is "Rose's Christmas Cookies".
It's got all your classic cookies in there. They even have a recipe for dog bisquits!
It's by Rose Levy Beranbaum, Author of the Cake Bible and Pie & Pastry Bible.
I've made just about everything in it! I'm on my 3rd copy.
Doesn't hurt that my name is also Rose and it is a conversion piece displayed in my kitchen during the Holidays 
Best cookie book I own (and I have quite a few) is Great Cookies by Carole Walter. It seems every one is a winner in that book. It's not what you're looking for if you want books about cookie decorating, though. Just delicious, homemade cookie recipes of every kind.
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