900 Bookmarks on AO3

I've just added the 900th bookmark to my collections on AO3. The fic that had the honor is a fairly classic one that I somehow only just got around to reading now, but is so, so good:

( Infiltrate by SkipandDi (ladyflowdi and MirrorSkippy) )

Here's a bit more explanation for my bookmark collections if you're interested.