I would give shopdiabetes.org a zero star rating if I could. I ordered this e-book and all I get is an error message. I followed the directions on how to download and view books from this site. I click the link and all I get is an error message. I ask customer service for a refund and I am told there are no refunds for e-books. I strongly recommend not buying an e-book from this site. I have never had any problems downloading and viewing books from any other site. I have been ripped off and will not use this site again to order ANYTHING!