So why only 3 out of 5?
Firstly, it's short. Only 74 pages in all, and the text have been formatted with line spaces. Although, the book is called "an Interview," I would have thought it would be a little more substantial. The interview questions are fundamental questions you would ask an author regarding his or her books, growing up, inspiration, their interests, etcetera. I would have expected something more insightful. It's not all bad news, considering the books was published in ten years ago, which can seem like a lifetime ago considering the development of the further books, and naturally the films, it's not a bad read. Most of the questions I've read/heard before (seeing as I'm a fan of Potter and Jo too,) but there were still parts I enjoyed reading.
Secondly, this book (which is frequently at the top of the biography lists about Jo) unfortunately, contains errors. The bibliographies and the end of the book contain a short blurb. For Goblet of Fire, however, the author writes "...Triwizard Tournament featuring Quidditch teams from Europe's greatest Wizarding schools." This is wrong. Two foreign schools (Beauxbatons Academy of Magic & Durmstrang) attend Hogwarts, and an individual from both compete with Harry and Cedric in the tournament. The schools are not Quidditch teams. Second, during Lindsey Fraser's interviews, she mentions that Harry's post is being intercepted by his aunt and uncle. Wrong again. It's the beloved Dobby who's the culprit. This doesn't inspire much confidence.
Another reviewer, quite rightly, has also identified these erroneous entries.
The book is far from penetrative, and aside from the Q&As, you can pretty much guess what the remaining overview of the book discusses. If you're new to Harry Potter, or have only skimmed through the wondrous pages, then perhaps this books with enlighten you. But if you've read the books and done some research on Jo, I don't think you'll unearth anything new here.
At the end of the book, there are two drawings of Fawkes, and the Sorting Hat (drawn by Jo herself) which made me smile.