Nice, atleast one story were Harry uses Polyjuice Potion.
Shame that Harry didn't use a hair of a female or maybe of two females, Like Tonks and Fluer.
They look for copies and fakes, but strangers?
Why couldn't Harry walk down the road?
It's something that has always bugged me, Serius place would allow apperating, right?
That book, does it needs pic's of real persons or can it be pic's of persons that don't exist, nor have ever existed(?) like Sherlock Homes?
If so, then it got two flaws.
1: You can't use more than one pic at the time. Handy with planning/designing things.
2: The pic-persons can't fill some black piece of paper in the book with the ino/plan/design/spell/idea/training they have in their mind.
Mmmm, think I also found flaw 3, you can't put a copy of your memories in the book so they know what is going on.
Bet Hermione will be quite mad when she finds those three things out.
Fun sidestory?
Harry has put some pic's of Heero before Wing Zero and Kira before the Strike and the Freedom in the book.
He also has the pic's of Docter Lang and all the Gundam Designers from Gundam Wing.
Really, with a bit of adding that book can seriusly start twisting the timeline. :D