Behind the Moon

Dr Alan Perriman, an ordinary mathematical genius reluctantly becomes involved in the strange and dangerous world of the ethereal 'Other Folk' and in their struggle against the evil Nystorian Hegemony. This takes him to the World of Bor Dyfan where a vicious mediaeval war is fought against the Hegemony invaders. The war is nearly lost, not even Fairy magic can save the Bor Dyfan Citadel, and Perriman is forced to return to Earth and attempt to find the one man who may have the power to save all.