Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I can't believe these reviews!?

Firstly, I've read virtually the entire works of Nabakov & consider him one of the greatest authors of all time. Secondly, Pnin is a terrible mistake. It is supposed to be comedic but is TOTALLY UNFUNNY, the eponymous character is dull and unbelievable, plotline almost invisible, the book as a whole is slow and awkward. Most of Nabakov's writing is as fresh and inspiring as a summer breeze but Pnin is like a bad case of halitosis. Forgive me, Vlad!