When Luna goes missing, and a new threat, unlike anything the Mane Six had ever faced before arrives with a plan to destroy harmony, the Mane Six, plagued with fear and paranoia, must find a solution, before it's too late, while trying to hope alive.
Audiobook demo: https://youtu.be/MIcA3-SoXQQ
Full audiobook version ($10) https://gumroad.com/l/WlHvx
Part one of the trilogy.