Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good book, terrible Kindle version.

The book itself is wonderful. However, the Kindle version is clearly an unedited OCR scan of a paper copy - it often reads a capital I as a 1, a double lower case L as an N, adds/misses spaces, etc. A simple spell check would have caught the problems, and some minor effort would have fixed them. As is, the errors make reading the Kindle version of this book an exercise in irritation. Not the quality of product I would expect from Amazon on something targeted at one of their flagship products.