Godsteed book 1 night of wolves

In a Kingdom brought to the brink of utter destruction, the unicorn slayer is close to completing his quest ? to destroy the white stallion, Aurion, before it can transform into a Godsteed. Can the immortal Horse Lords of Senfar save the last unicorn and restore hope and magic to the world? And can they find the true bonded rider of the horse before all they have fought for is lost?