Grove G. R. Grove 
Druid’s Son [EPUB ebook] 

The Roman armies are conquering Britain: they have destroyed the Druid sanctuaries and savagely crushed Boudicca’s revolt. In these desperate days, knowing his own death is imminent, the last Archdruid of Ynys Mon engenders a son. The boy’s mission: to defeat the Roman invaders and preserve his father’s heritage. But can he possibly survive long enough to achieve his goal?