As you are a Gaiman fan, I'd love to hear your thoughts on comparisons between Harry Potter and Tim Hunter. Coincidence? Or not?
I haven't read much of Gaiman yet but I suppose you mean the hero character of Book of Magic?
I think it's not a coincidance but if I recall correctly (correct me if I am wrong), Book of Magic was released before Harry Potter, no?
By any means, I cannot comment on that one because all I have is a preview at the end of Sandman: Preludes and Nocturnes.