Skandar and The Phantom Rider: Skandar Book #2, A F Steadman

The Island shall have its revenge . . .

Skandar Smith has achieved his dream to train as a unicorn rider. But as Skandar and his friends enter their second year at the Eyrie, a new threat arises. Immortal wild unicorns are somehow being killed, a prophecy warns of terrible danger, and elemental destruction begins to ravage the Island.  Meanwhile, Skandar’s sister, Kenna, longs to join him – and Skandar is determined to help her, no matter what.

As the storm gathers, can Skandar discover how to stop the Island tearing itself apart – before it’s too late for them all?