Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Nice idea, but the puzzles have problems

Really the only good thing I can say about this book is that it introduced me to a variety of puzzles beyond Sudoku. Being a fan of Sudoku, I was excited to learn about some other Japanese puzzles. I flipped through this book in a bookstore and it seemed like a good purchase, but after having spent quite a few hours with this book I discovered the same problems other reviewers have, e.g. wrong solutions, multiple solutions, repeat puzzles, ambiguous difficulty, etc. It's been an annoying journey with this book.If you are interested in Masyu, Nurikabe, Kakuro, or Hitori, look somewhere else.