I ordered Solutions Manual for Stephen G. Kellison's the Theory of Interest on October 4th. I emailed the seller to obtain a tracking number, waited 5 days for a response and was then informed that this book is on backorder. I am annoyed that I was not informed that this book was on backorder BEFORE I ordered it. And I'm infuriated that my time has been wasted and I now have to turn around and start the order process all over again@!