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

I read the first 6 chapters of this book and I have to say I'm disappointed.The good:1. The book is well written in the sense you can tell the author is excited about the subject and he tries to share that excitement with the reader.The bad:1. This book is not mathematically precise enough.2. There are typos everywhere, there is an erratta, but I have still found some typos.3. The book is not well written in the sense that the author doesn't explain the mathematical concepts well enough.I give this a 1/5 simply because the typos caused me a great deal of time and the vagueness at times just brought upon lots of confusion.