I listened to part of this on Spotify and decided to buy the CDs from Amazon, mainly to obtain the synopsis and libretto on the CD-ROM. The opera is supposed to be on 3 CDs. The fourth disc is supposed to be the CD-ROM but it is, in fact, disc 3 incorrectly labelled. So the box actually contains 4 audio CDs, 3 and 4 being identical audio discs. There is no CD-ROM.