The Dark Tower: Little Sisters of Eluria #4
Unless he can free himself within moments, Roland Deschain will be devoured by the dread Little Sisters! He was taken in by the nuns because of grave wounds he suffered, but has since learned they are anything but healers. The Little Sisters are actually vampiric creatures thirsting to drain the life from wayward travelers. Helpless in his sickbed, the last of the line of Arthur Eld may soon be no more as Sister Coquina approaches him, fangs bared, ready to feast! Continuing the last gunslinger's quest for the elusive Man in Black as he faces near certain death.