This book, very much like its predecessor, reviews all the clues that are presented by JK Rowling in the Harry Potter and the Order of he Phoenix. It breaks the clues down to specific chapter for that book and/or shows how it is related to the entire septology. The book also points out the connections between names and numbers to events and people. Again, this book also leans more toward the UK version rather than the US version.
However, this edition for Book5 does not paraphrase the section of the chapter discussed but only shows the explanation of the clues. This manner makes it much harder to follow unless you have the actual book open with it.