Bests & Worsts Reviews from Amazon

I feel as if I have been scammed. I ordered this book believing it was the latest DeMille novel and after page 1 realized it seemed familiar to me. By Page 2, I grabbed my copy of Radiant Angel and saw it was the exact same novel but with a different title!! Unbelievable! By the way, I purchased both books through Amazon. Subsequent research by me determined that A Quiet End is the UK version of Radiant Angel. Really?! Do I have to do that kind of research before I make any future purchases purchase from Amazon?? Shame on somebody!