Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I wish it were possible to un-read a book

To put it simply, this novel is a large brown stinking turd. Every bad thing said in every other review is utterly true, it's not nearly as good as the first attempt by those famous million monkeys with a million typewriters. As a LONG time fan and reader of Niven's works, whose stories led me down fascinating paths of amazing storytelling, fantastic worlds and fascinating characters in my youth, it really does break my heart to realize that two writers who had so much talent and ability to create interesting stories have fallen this far, and I hate that all those great memories have been capped by this. I pray they realize their careers are over and just gracefully retire. Don't waste your time and money with this, if you really need a book to read grab the dictionary instead - the random words you find will make a more cogent plot and enjoyable story.