Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Painfully Slow and Wordy

I was disappointed by this biography of one of the most interesting and popular figures in American history and letters. Unlike so many of the other reviewers I found this biography to be excruciatingly long and boring. It takes quite an effort by a writer to make as fascinating a person as Mark Twain dull, but the author succeeds. The writer kept throwing in his personal asides in an effort to be clever, but instead was merely annoying. The writing style is awkward and stilted and it takes a real effort to push through to the end. The author seems to be trying to direct attention to himself as much as the subject. This style makes the 722 pages seem twice as long.