Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Too many errors

I purchased this review book with the understanding that it was written and edited by professionals. I am into the second practice test and I have found several errors. ONE IS CRITICAL. I will write another review when I have finished all the practice tests (there are 5), and update any further discrepencies.At this point I would NOT recommend this book to anyone studying for the PTCB for the first time.