My per diem is such that I currently reside in a location where the ownership of an expensive bass is not prudent. So I was in the GC wanking jazz on a six string marked down below $400. And a young guitarist asked me how I knew all that clever crap . And I gave a brief discourse on theory and then steered him over to the book section and selected the best theory book they had. Which he bought. I watched em ring up the sale. I am proud of myself. Can you return books at GC?