V3 P13, 6%
"However, if any sacred beast, like Cass or Lag, had refused the release, I wouldn’t have been able to do it."
Cass -> Cas
16%
"Epilogue: The Most Frightening Guard (The Pope)"
This line looks like it should be a heading, with paragraph spaces before and after it.
Same with "Afterword", 83%
74%
"However, I’d had no idea that, through my magic, demonic charm power had accumulated within the priests themselves."
It works as is, but unless 'charm' is specified it might work better simply as 'demonic power'