On the Vigil of Easter in Rannoch, Scotland in 1155 AD, a flying saucer crashed into the bog near a church and and monks must fight the alien invasion.Published in MONK PUNK, an anthology edited by AJ French and available at the Static Movement Book Store.
http://www.staticmovement.com/
For slightly more at AMAZON
Also on the KINDLE and the NOOK
A review at HELLNOTES
A review at Ginger Nuts of Horror.
Another Review at The Future Fire