Instruct: Classify a given review as either positive or negative.
Query: Great writing!

This book is fantastic for a young student gifted in mathematics, or even a solid student who would like a bit more of a challenge. It's math of a more advanced level but the language holds the interest of a younger student, without talking down to them. And it explains the higher mathematical concepts in the way a younger child's mind would work! It's like the author remembers well how he thought when he was a kid and wrote the book from that POV. You can see the light go on in the child's eyes when that algebra or logic concept clicks!This is the way math SHOULD be taught and if we gave kids a solid foundation and then gave them a challenge like this, and taught them like this, they'd be far and above students anywhere, I think, because it's not a book of tricks, it's solid math, and FUN.