"Dumbledore's Army and the Year of Darkness" by thanfiction

http://www.fanfiction.net/s/4315906/1/Dumbledores_Army_and_the_Year_of_Darkness

I'm not really familiar with thanfiction's fandom history  but this is a pretty well-done fic with a fairly ardent fanbase. I usually try not to rec stuff that's already well-known unless I truly love it (like "My Immortal" or "Slytherin Spy") but I really quite enjoyed this and I figured, Why the hell not?

It's about what happened for the DA during year seven. Pretty enjoyable.