This story is a sequel to Past Sins

In the wake of the battle with Tirek, Twilight Sparkle becomes fixated on restoring Golden Oaks Library. After all, it was home for her little family of three. But as her attempts to repair the books and tree continuously fail, her friends must take matters into their own hooves. Discord, as the good friend he is, tosses Twilight and her extended family into an unexpected adventure while Twilight's other friends get to work on the new crystal palace.

All together, they'll do everything to ensure Twilight and her family have a place to call home when they reach the end of the road.

This story is a sequel to The Elements of Friendship, Book IS [interlude one-point-five]: Bonds

Peace has found Equestria once more, and they have had their Queen of the Night returned to them! But a dark figure who looms over Equestria's past returns to the present: Discord. The chimerical despot over Equestria in a bleaker age threatens to throw the stable regime into a dominion of anarchy. Worse still, he has removed his one weakness, the Elements of Harmony, from the equation. How will Twilight Sparkle defeat the draconequus deity without the Elements of Harmony? How will her and her friends stay in unity without the Elements? And what connection does Discord have to Equestria's Queens...?

Updates on Wednesday afternoons.
Can be found on TV Tropes.

The Elements of Friendship, Book I: Harmony
The Elements of Friendship, Book IS [interlude one-point-five]: Bonds
The Elements of Friendship, Book II: Chaoskamπf
The Elements of Friendship, Book IIS [interlude two-point-five]
The Elements of Friendship, Book III
The Elements of Friendship, Book IIIS [interlude three-point-five]
The Elements of Friendship, Book IIII