Best of - of what?

Those who expect a collection of the best-known title, will be disappointed by this board. The best-known title is present in a very poor live version:
The Night They Drove Old Dixie Down
The only better-known works would then:
Diamonds And Rust and it's then also to a star. The rest does not correspond to the best of Joan Baez and has not even been properly prepared for the CD.
We shall overcome, Amazing grace, and many more are missing.