Well, this is not really a book per se
- more like a short story published online, featuring James, Sirius and two unsuspecting English policemen.
I would have liked a little bit of Moony in here as well. And Snape! Why, oh why wasn't this about the time when Snape went underneath the Whomping Willow following behind Lupin and spotted him transforming into a werewolf and almost got killed doing it but then was rescued at the last minute by James?? WHY?????
So, while it didn't exactly create butterflies in my stomach the way the Harry Potter series does, anything JKR writes is still golden!