So it is written.

The Book of Flies was written by Goo, the fly historian.  He was also the first fly to scribe the Bhuti fly language into letters and words.  One of the ancients, he was spawned in the same cycle as Slack the Recycler, the son of Gad, and Gad is the god of all flies.  Goo became a disciple of Slack and was one of the first of the zealot messenger flies  that Slack ordained.  So it is written and so it is.