lamarca, get hold of a copy of Eva's biography (also called Songbird). An extremely talented artist and musician as well as having that beautiful voice.She was painfully shy but extremely determined to do the music she wanted and not what some record company thought she be.
The book gives the impression she would not have been comfortable as the big star but we are really lucky that her friends gave her access to recording time or we may never have the record of her work that we have now.
Cheers Gary