Queen's Fall

From publisher blurb:

The fey realms have long enjoyed balance—a delicate balance, perhaps, one wrought by the relative equality in power each faction shared, but a balance nonetheless. As stories of the fey were spread, the subsequent power of each faction waxed and waned, but never to the point that the balance was disrupted.

Then, as the power of the forest spirits was whittled away over time, the satyrs saw an opportunity. They carefully infiltrated mortal societies, nudging rumors and stories a bit here, a bit there. The satyrs saw to it that their power grew, and the forest spirits were further and further diminished. Now, with all their plans coming to a head, there is only one thing left for them to do. The satyrs march to war.