Wolfgang, if you have all their old LPs then you have all the bonus songs. They're just cobbled together from the albums that hadn't (at that point) been issued on CD. The only exception I'm aware of is a Waterdaughters track on "A True Hearted Girl", but I think you can live without that

The only CD that has any rhyme or reason to it is Frost & Fire, where all the additions are pegged onto the end, and all come from the Sound Your Instruments of Joy LP, which does seem relevant to the content. But of course they could have included ALL its tracks, plenty of room