I have a book that is excess to my needs (and probably above my level too!):
RF and Baseband Techniques for Software Defined Radio by Peter Kenington. See it on Amazon at:
Regular price is in the $150 range if you do a search with Google for it. Used copies sell in the $30 range. My copy is brand new, in the original sealed shrink wrap. I'd like to get $30 plus a few bucks shipping for it but would entertain lower offers if need be. This is not just your armchair reading book, but a pretty serious technical professional book. You can get more info on it with Amazon and also by Googling the title and reading the numerous hits.
I can mail it, or if you will be at OzarkCon, you can pick it up from me then (Saturday only) and save shipping.