I'm still amazed no one else is addressing the COMPLETELY LOUD SINGING THAT COULD LEAD KEST TO HIM AND HIS GROUP.
Anyway, I thought that DarkTemplar was giving everyone the chance to give their thoughts on the contents of the books? After all, it's pretty straightforward-like. There are plenty of corpses of Kest/other species hybrids. I'd think that they're experimentation logs or something. Whether or not it was from a cultist, or an independent madman, it's really up to someone to decide?