Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Most powerful of the "sword" series

I found this to be the most compelling book to date in the SWORD series. Although all of them have good points, I felt that SWORD SINGER provided the best insights to the characters. It seemed to take a decidely more somber tone than the first, or successive novels.Tiger and Del, having found Del's brother in SWORD DANCER, now move north to confront the demons, both literal and figurative, that haunt Del's past. They return to Staal-Ysta, where Del must do penance for slaying her teacher and reconcile herself to past decisions.