Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Greatly disappointing

Of course the protagonist lost not only his memory but had the misfortune to fall into an alternative universe where in 1958 there existed the concept of xeroxing documents along with Cadillac Eldorados and Ford Fiestas, which in our universe came along many years later. I too would have been as confused as our less-than-intrepid author, and I too would have lapsed into insipid dialog and unreal plot twists.Mr. Follett gives great credit at the end of the book to his researchers, etc., who helped him. Too bad none of them had the brains to do any research into contemporary history.For shame, Mr. Follett.