This was one of the books that I used for my Introduction to Logic class when I was in high school. Not only are the concepts explained clearly but they are layed out in a way that does not talk down to you. Its fun to read yet very practical in the sense that there are places where the author(s) correlate informal/formal logic concepts with the real world. One example shows how certain rules in Truth-Functional Logic relate to electrical circuits. In particular for AP English Students, this book can be a great complement to your other required texts. I recommend this to high school/college students, professionals, or enthusiasts who are seeking to better understand and improve their critical thinking skills.