I happen to be reading Paddy Tunney's The Stone Fiddle at the moment.This does include a lot of irish folklore and stories, but also the words and tunes of quite a few songs, and even the entire text of a mummers' play.I've always loved Paddy's singing, and he writes like a storyteller - " Salmon gleamed in the nets like silver scimitars.... one of their number could easily have been Bradan Easa Aodh Ruaidh or the Salmon of Assaroe itself,famed far and near for wit and wisdom,although it was only three hundred years of age."
It was published in 1979 - probably not available for download though.