Instruct: Classify a given review into positive or negative sentiment.
Query: Author lacks experience with the drug

I was disappointed with this book. The first author is a doctor, but appears to have no experience actually prescribing the drug. He was asked to write the book when the drug was to be released in the US but had little or no first-hand experience with its use. Therefore, the entire book reads like a very pedantic review of the scientific literature, with long sections explaining things such as what double-blind studies mean. Furthermore, the author is overly cautious in that despite dozens of studies he is often unwilling to reach tentaive conclusions but says more studies are needed.The book Stop Depression Now by Richard Brown et al. on Sam-e describes extensive experience with prescribing the drug to hundreds of patients and contains everything and more from this book. While Brown may be somewhat an over-enthusiastic salesperson, the book contained much more useful information.