I've gotten the pleasure of reading this book before it went live, and it is absolutely a fantastic page by page and line by line overview of Harry Potter and the Philosopher's/Sorcerer's Stone.
It comes at an especially great time in the fandom, with the release of Pottermore around the corner (and even now for those few of us who are already on the site) we find ourselves wanting to re-read the Harry Potter series while we discover the new content on Pottermore. There is no better guide to re-discovering Harry's World then Steve's new book.
Each book will give you his thoughts as well as point out things that we didn't notice the first time reading the series, clues that point to later in Rowling's books, and we can begin to see how they connect even back from the beginning.
As a fan of the Harry Potter series, I found Steve's book a tremendous starter for talking points with other fans. I highly recommend this cheap little guide book, as your map to re-discovering Harry's Magical World.