There is a wide difference in styles of music between the likes of Pete Seeger, Kingston Trio, Ewan McColl, and the field recordings collected out of the Ozarks, or the Maritimes, or Virginia.

There is so much variance that it almost seems like totally different music.

Can you tell us what your friend has heard, and what she is enjoying. We can then suggest others of the same vein, and perhaps explain the differences between the types, and why she might like something different.