High school English teacher O'Connor, currently of New Trier HS, wrote this book as a guide for teaching poetry. It is organized by poem type, which is useful for teaching. (There is a chapter on list poems. He defines the type, gives published examples, explains how and why he presents them in the classroom, gives student examples and results.) His students span middle school and high school. The book is published through NCTE, and so is cheapest if purchased there.