Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Well written introductory text

A well written book. Unlike many other authors that present a theorem and left readers to be perplexed at some point, Nancy Rodgers provide a thorough guidance toward the subject. Explaining the meaning of each theorem with enough examples, guiding readers how to express their logical thought by manipulating mathematical symbol and operator. Suitable not only for math or science students, but also for anyone (with some math background) interested to learn the subject (thus improving the way they express their thought).