The Prokofiev Page. The complete catalog includes links to where to buy sheet music and recommended (and other) recordings. Do other composers have web sites like this? This appears to be the work of a web design firm and is, alas, not part of a series.

Does anyone have copyright control over Prokofiev's work? Is there an estate that controls his work? He's modern enough that I suspect his work is under some kind of copyright control, but I don't know what form it would take, if any. Or is his work public domain now?