Sequel to 12 Rites of Passage; repercussions from their last case lead to the shut down of the X-Files and an unwilling separation between Mulder and Scully.
Lovers Series: Expressions of love. Two short companion stories to 12 Degrees of Separation.
The tags keep falling off this one, not everything is tagged.
There's also an unofficial sequel to 12 Degrees of Separation called Nightscape by Kristel St Johns.