Not The Best Text At Teaching How To Write Proofs. First, This Text Is Very Verbose. Second, Clarity Is Lacking In Some Explanations. Third, The Text Does A Mediocre Job of explaining how to write proofs. Fourth - Richard Hammack's "Book Of Proof" Is Far Better, More Rigorous, And More Concise.<br><br>This Book Is A Good Reference, But If You Are Thinking Of Buying This Book, You Need To Buy "Book Of Proof" As Well - Best Math Text I've Ever Read, and I'm a Certified High School Math Teacher in Texas.