Hi, Mark. You might want to take a look at what a search just putting in Silver Burdett produced at Bibliofind.

I saw a #3 available and also a 1985 Centennial Music Book by Elizabeth Cook, one of the originals listed on the other book, so maybe they've republished the whole series?

ON THE OTHER HAND, a quick search HERE at BOOKFINDER shows several copies of the one you are looking for.

Have fun, katlaughing