Jack Williamson 
Demon Moon 

According to legend, Zorn’s distant ancestors had vanquished fiery devils from the Demon Moon. Now, a thousand years later, that bloody red world looms closer every day. But Zorn knows little of the past. For generations, his family have been Lords of Wolver Riding, flying their winged unicorns to protect the land from werewolves, wyverns and other deadly threats. As Zorn grows, he finds his world increasingly strange. Where did the werewolves come from? How did unicorns fly?His questions end the day his evil uncle usurps the throne. Torn between ancient fears and modern science, wooed by a seductive temptress and plagued by a demonic priest, Zorn must unlock secrets shrouded in the mists of time – or watch everything he loves be consumed in the hellfire of the . . .