Nopony knew that one changeling would have such a major impact on Equestria's future.

Shade is dead, leaving Chrysalis free to take over and do with Equestria as she pleases.

And these are the last memories of Princess Celestia and Fluttershy...

First book is here: Son of the Princess

Second book is here: Son of Chaos

Alternate ending to Son of Chaos: Son of Peace

Third book is here: Son of Change

Fourth book is here: Son of Eternity