A morbid taste for bones - Ellis Peters

A MORBID TASTE FOR BONES
Shrewsbury, 1137. The ambitious head of Shrewsbury Abbey has decided to acquire the remains of Saint Winifred for his Benedictine order. Brother Cadfael is part of the expedition sent to her final resting place in Wales, where they find the villagers passionately divided by the Benedictines' offer for the saint's relics. But Cadfael isn't surprised when this taste for bones leads to bloody murder...
ONE CORPSE TOO MANY
In the summer of 1138, war between King Stephen and the Empress Maud takes Brother Cadfael from the quiet world of his garden to the bloody battlefield. Not far from the safety of the Abbey walls, Shrewsbury Castle falls, leaving its ninety-four defenders loyal to the empress to hang as traitors. With a heavy heart, Brother Cadfael agrees to bury the dead, only to make a grisly discovery: ninety-five bodies lie in a row, and the extra corpse tells Cadfael that the killer is both clever and ruthless.