This is the book from the 2006 Harvard student plagiarism controversy. I was reminded of it with all the Fifty Shades
This link gives some of the examples of the passages in question:
To be fair, I haven't read the book from which Viswanathan allegedly plagiarized, but at the time I remember thinking it seemed to be a case of one mediocre book with trite sentences copied from another. The book was eventually pulled from stores and destroyed.
I find it somewhat ironic that the examples of suspected plagiarism here are relatively subtle when compared to the similarities between Fifty Shades of Grey and Twilight (there's a good example in this review
). And yet Stephenie Meyer seems pretty unconcerned about it all