I have an HP reading club and have used these Scholastic Guides. Great resource to use in conjunction with something else. There are many activities and it includes the poster, which has never been removed or used.
Quite a bit of information in a 16 page book. The inside of the back page also contains useful information on how to use the included poster.
I used this while I was reading the Harry Potter series to my two boys (7 & 9) during the summer. I used both the "Comprehension & Recall" and the "Higher-Level Thinking Skills" as we read throughout the book. Afterword we finished the book the I copied the worksheets for them and they were actually excited about working on them.