Book excerpt: What is it about Ireland' s past that so haunts the imagination? More than one answer can be found in Michael Scott's powerful new collection of 29 tales. To start with, in a newly Christianized Ireland, monks do battle with a devilish monster that has killed a river. All the water in this collection, from rivers to lakes, conceal dangers that men and women would best avoid. Ready to tempt Ireland' s new conquerors -- humankind-- supernatural forces hide beneath waves, in bogs, in the very land, waiting. With his usual inventiveness, Michael Scott juxtaposes the old and the new, the ancient and modern, showing that in everyday situations, the curses of Ireland' s mythic past lie imp- like, threatening destruction.