Instruct: Classify a given Amazon review as either positive or negative.
Query: Wonnderful book!

I'm from Belgium. I was on holiday, walking in Harvard campus when my attention was kept by this wonderful book...2 minutes were enough to convince myself to buy it and it was definitly a good choice!I'm an engineer and even if the content is more like "basic" maths for everyone intersted on the topic, I must admit it is a very useful and broad reference, introducing deeply all important in everyday's life math topics!Nevertheless, I found one little typo and would like some readers to confirm this fact : in the on the fundamental theorem of calculus, one assumption is that the area below the graph from a to x is called A(x), but on the graph, it is called Delta A(x). Can anyone confirm that it is a small mistake or that it has been corrected? Such a book deserves to be totally free of typos, especially for such an important part of the book: the fundamental theorem. Actually, it is a bit a pitty that such a theorem is not fully demonstrated, but that only dA(x)/x = f(x) is proved.