Robert Westall 
Urn Burial [EPUB ebook] 

Life is simple where Ralph lives, up in the Pennines. It’s peaceful. Ordinary.Until one day, when out with the sheep, he finds something strange, too strange to be from Earth. The alien grave holds secrets of the past, but also draws Ralph into the middle of an epic war between two alien races, taking place among the stars above his head. Has he thrown his planet into a battle it can’t possibly fight? This war has raged for centuries, but perhaps Ralph could hold the key to ending it once and for all.