Filets with Tim Byres' BBQ Beef Coffee Cure (Photo by Gary Jacobson) My friend, Martha Gooding, says if you get one good recipe out of a cookbook, the book is worth the price. By that measure, Tim Byres' new cookbook, Smoke, is a tremendous bargain. I got two great recipes, and if you stay to the end of this post you'll get one of them: Byres' BBQ Beef Coffee Cure. So far I've used it twice, on New York strip steaks and filets. It's wonderful. Hope to try it soon on brisket. The other great recipe is for homemade sour…