'Lake of Shadows' is the name given locally to one of the most enchanted stretches of water in Ireland - Lough Swilly in County Donegal, writes Coulter. It has witnessed some of the most significant events in Irish history and has been the scene of some of the happiest and some of the most tragic times in my own life. This follow-up to the Grammy-nominated Highland Cathedral features special guests Sinead O'Connor, Liam Neeson and Roma Downey.