Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good book, lousy Kindle rendition

The book was most interesting but the Kindle experience was very frustrating. If Amazon wants that people are willing to pay a decent price for ebooks, the editorial quality must mach that of printed books. All the mathematical formulas in the book were full of mistakes: dxldy instead of dx/dy, A instead of Delta, x" instead of x^n, I instead of 1 etc. I could go on and on. It looks like they took the book through an OCR software and didn't care to check it afterwards.I haven't seen the printed version but if it is of good printing quality, I would recommend it to anybody interested in the history of mathematics and the peculiarities of transcendental numbers. Now the reading experience was shadowed by my trying to understand what the misprinted equations really mean.