Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Painful

Over the years, I had read all of Le Carre's books except for this one. I recently decided to give "Naive" a try, notwithstanding the departure from a "spy" theme. Subject matter aside, which is a two man, one woman love triangle, the book is painfully slow. While I usually find Le Carre's character development to be compelling, and his books hard to put down, I had great difficulty getting through the middle of this one. I'd never before read one of his books and found myself anxious to be finished. I'm an enormous Le Carre fan--I think of him as my favorate author. Nonetheless, my advice is to skip this book.