A standard cd-rom format developed by philips for cd-i. It is iso 9660 compliant and uses mode 2 form 2 addressing. It can only be played on drives which are XA (extended architecture) compatible.

Many Green Book discs contain cd-i applications which can only be played on a cd-i player but many others contain films or music videos. Video CDs in Green Book format are normally labelled "Digital Video on CD"

Green Book was obsoleted by white book cd-rom in March 1994.