Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Suspect

The very first thing I saw when I opened this book was in the section on moon magic. This book states that the lunar period is 27 and a half days long. This is stated repeatedly. And it is incorrect. The lunar period is 29 days, twelve hours and a few minutes. If this book can't get that simple fact correct (easily verifiable on- and offline), what else does it breezily assert?