Life and Times of a Winning Pony and Earth & Sky are both sequels, but their respective root fics are short, enjoyable reads and the fics themselves are definitely on my "drop whatever I'm doing to read them list" when they update. Background Pony you probably already know, since everyone seems to have it in their top favorites and it's catapulted SS&E to instantly making the feature box with all of his uploads (or is SS&E a her?). Keeping It Simple is my favorite depiction of Mac ever and it's a great mix of warm fuzzies and sad moments. Treasure in the West takes a concept that sounds like it couldn't possibly work played straight, then plays it straight gloriously. Read it.