I bought this book for my library, thinking it would be an excellent way to introduce teenagers to philosophy, and I am sure it will be lifted from the shelf many times. Unfortunately, I am also sure it will nearly always be put back there very quickly. While not exactly turgid, it is too heavy-going for the average Harry Potter reader, and is probably most suitable for university students of philosophy.
I found it a fairly interesting read, myself, although the arguments often seemed flawed to me, and as I struggled to follow them I found the references to Harry Potter irritating. It made me wonder whether the HP element was just a sales ploy.
If the authors genuinely wanted to get the typical Harry Potter fan interested in philosophy, I feel they could have tried harder. For each essay, they could first have related in detail a particular issue or dilemma in one of the stories, and then explained, in easy language, how it is interesting philosophically. I feel a great opportunity has been missed.
I have read much better introductions to philosophy, i.e. ones that present the arguments clearly and simply and methodically, and hold the reader's attention.
These essays varied in readability and quality, but one stood out. Kreacher's Lament, about discrimination and indifference, is well worth reading and should be life-changing.