My advice would be:
Go to a record store, search A-Z- and look up the name Dusty Springfield. You may be in luck and find one of those cheap compilations that are rarely authorized. Seeming Dusty is probably rich as croesus, or whatever, it doesn't really matter if she misses out on a buck or two: take the CD to the counter, buy it, take it home and listen to it...
If you want to know about her life, go to a bookshop (second-hand or new, doesn't matter), find a book, read it, and save your money on a musical that a) has new music, b) new lyrics and c) new book. My opinion
R.L.
Who can explain it, who can tell you why?
Fools give you reasons, wise men never try
-South Pacific