Sorcerer's/Philosopher's Stone in Fifteen Minutes is in the book (somewhat available in hardcover and paperback). (Icons with sample quotes.) I have no idea if we will ever do anything with the North American rights and get it published here (long story). If I can find the original document files, I may just say to hell with it and do an e-book, since I didn't sell those rights, either.
Chamber of Secrets was before I started doing these, so it hasn't been done.
Prisoner of Azkaban in Fifteen Minutes.
Goblet of Fire in Fifteen Minutes.
Not sure why Order of the Phoenix didn't get done.
Half-Blood Prince in Fifteen Minutes.
Deathly Hallows part one hasn't been done yet. I'm going to do both parts, hopefully, after I see the second movie this week. It may take me a while.
The Annotated M15M: Wizards e-book.
While we're here, if you have any Harry Potter-specific suggestions for CafePress designs, let me know. The current ones are a bit vampirey.