I just bought a beautiful looking CD on e-bay called Lady Sings The Blues: The Lost Sessions. I was wondering where the material on the CD comes from - has it ever been released anywhere before?

http://www.ebay.co.uk/itm/2726041810...%3AMEBIDX%3AIT

There is also another 2017 unoffical CD with rarities that I bought:

http://www.ebay.co.uk/itm/2726041803...%3AMEBIDX%3AIT