OK how does this sound. In one of blackmore's knight's songs it meantions 7 sisters. from the song guessing it's 7 sisters of the stars. What it also meantions is the book of secrets.
Since there is god slayers we know about the war of the gods guessing around or more likely befoure the war of the dragons. At a guess not read the books the god slayers were made first.
So from that what do you think about the book of secrets being the god of life. The book tells all the secrets of life but in the hands of earthly ones it's cursed to help keep it all a mystery to them.