The best way to determine both the title and author of a book on the basis of a plot synopsis is to employ a website, such as Reference.com or Wikipedia.org, that can search specific details of the book. Both these websites can locate most books by referencing a decisive incident in the plot, a character name, or other distinctive characteristics of the work in question.
Most fictional plot synopses isolate distinctive attributes of a book. Both websites can identify books on the basis on specific information such as proper nouns and plot points. In the event that you have difficulty isolating a distinct work of non-fiction on the basis of the individuals or incidents involved, conduct your search with respect to the book's individual take on the subject. Note how the book begins and how it ends. Structurally, non-fiction usually tries to make an illustrative example in both its first and last moments to make an original point about the subject, and this can be one key to identifying the book.
The perspective of the book can also isolate the work you're looking for. A psychoanalyst talks about a topic differently than an economist, and the varieties of both psychoanalysts and economists can further narrow your search inquiry. What compelled the author to make her own contribution to the events is usually a distinguishing characteristic from the majority of other books on the same topic that she found lacking, and these websites filter on the basis of these distinctions.