Instruct: Classify Amazon reviews into positive or negative sentiment
Query: interesting book, yet muddled

This book's strongest suit is its history of Tesla's business dealings, and his meetings with other famous individuals of his era. The author obviously conducted a great deal of research. On the other hand, I found myself wishing for a clearer explanation of which of Tesla's ideas were clearly scientific advances, and which were fantasy or unworkable. Unfortunately, the author sometimes discusses his own belief in ESP and other pseudoscience, which calls into question his overall credibility.