I have a good grasp of theory and am able to read music, but I want to take my sight reading to the next level. At the moment, I'm just working through the real book, and trying to read a little every day. I wonder if anybody has a recommendation for a method book that they are particularly fond of. Or perhaps not a book, but some other resource. I fully understand that sight reading traditional sheet music for guitar - perhaps especially for jazz - is a lofty goal, and will take more than spending $20 on a book, but I wonder if there are any real mavens out there for a particular book or resource that might have aided the process.