Korgnex did put together an impressive list on Michael's unissued material, though it should be pointed out that some of the included "background information" is entirely false.
It seems as if the production date of certain songs were guessed on the spot. For example, the title Lucy is in Love With Linus was only confirmed to exist once and there was nothing said to indicate when it was recorded/produced...though it is listed as a Dangerous outtake. Dozens of songs suffer from this.
Granted, these titles do have disclaimers included...but why even include the title at the risk of confusing fans if you don't know the information without doubt?
Much of the information included is correct, but there is more than enough that is bound to leave certain people unsure of a title or when/where it was produced. Best to avoid it as a reference point.