Is Annabeth a daughter of Athena?
The BotL/TLO Era
Futurefics and AU
SON Reunions and/or Angst
You Know This Is Really the Motivation For FanFiction (smutfics)
Pretty much anything by any of the authors listed.
(and to cap it all off, some shameless self-promotion)
This post shall henceforth be known as the Official Percabeth FanFic Rec List. Any suggestions shall be sent to the ask box.