And while on the theme of Harry Potter

I would like to recommend a particular work of fanfiction to you. In case, you are a complete neophyte and have no idea what fanfiction is... here is a definition from Wikipedia:
Fan fiction (also commonly spelled as fanfiction and frequently abbreviated to fanfic or occasionally just fic) is a broadly-defined term for fiction about characters or settings written by fans of the original work, rather than by the original creators. Fan fiction usually describes works which are uncommissioned by the owner of the work, and usually (but not always) works which are not professionally published. Fan fiction is defined against original fiction, which exists with its own discrete universe, and against canon works within the universe. Most fan fiction writers assume that their readers have knowledge of the canon universe in which their works are based .

So I am taking the liberty to divide fanfic into certain categories... this is my definition and my interpretation.. you are free to agree, but of course, you are wrong, and I am right (on this blog at the very least.):

1. Plot extension: same characters, same story, extending the tale. Very much seen in ongoing works.. where it assumes a speculative air about what the next genuine volume will contain... such as in the HP series.
2. Alternate Universe: quite obvious. Same characters, but plot development follows quite different lines. Subcategories may include crossover genres where two major works of fiction may be combined.. in some hilarious cases, HP and LOTR.
3. Prequel: sometimes written so as to be self consistent with the bona fide literature, while talking about events leading up to the actual story. May sometimes consist of the histories of specific people who may/may not be central to the bona fide story.

The story that I am about to recommend is by the Wolfie Twins, and is called the Call of the Wild. It is available here. Do read it. It is somewhat long, but the writing is quite good and is rather erudite. There is much to discover and very little that is trivial. It is a must read for lycanophiles. Does that pique your interest? It should. Remus Lupin fans, attention! Read!

Ok, so this particular work deals with Lupin and what made him the man, or rather werewolf he is.