Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Too many errors, not worth the cost

I bought this book set to prepare to take my ChE PE exam. The example problems are riddled with errors, and the material presentation sometimes takes giant leaps ahead (i.e. employing concepts or equations they have not yet presented). After a few chapters, I abandoned it. I recommend buying the practice problem book from NCEES instead. Break out your college reactions, thermo and transport phen. books, and take your Perry's to the test -- everything you need is in there.