Jack and the Banshee's Wail

In the fourth book of the Adventures of Jack series, Jack and the Banshee's Wail, war has come to the Kingdom of Munster despite Jack's efforts to preserve the peace. The men of Lismore must march off to battle and a heavy cloud of dread falls on the village as families wait to hear about their loved ones in the army.But things take an even worse turn for Jack after a chilling encounter one night. What will he do after he's heard the banshee's wail?