I just got the book on Friday, and have had my nose in it all weekend! (And I'm only half through the book.)Just the breadth of songs in the book is amazing, but the inclusion of explanatory information on each of the songs is so much more than expected. I'm sure ANY Gaelic learner/singer will want to have this book in hand.
Auldtimer, I have never heard her perform live and have only 1 cassette of heres (Sings Songs of the Gael), and found the information given in the book to be most informative and gives an impression of her dedication to Gaelic in general and song specifically to be high on her priorities.