Noticed some extra things that would be good to tweak in the book, but also in some other areas of localisation:

• Brews section, Deviant's Decomposure. It mentions that the effect works well against 'pillagers', which aren't in 1.12.2, so it might be best changed to 'illagers', which covers other illager mobs too.
• Cauldron overview. Can't find anything in the cauldron overview saying that Wood Ash can be used to clear the Cauldron out if you mess it up.
• Brews section, Eye of Old. It would be handy to mention that the Eye of Old gives both Water Breathing and Night Vision, perhaps a brief mention under both the Water Breathing and Night Vision effect sections.
• Ritual fail messages can be rather vague, only saying 'Something is wrong'. It might be best to clarify what exactly is wrong for particular rituals, like 'An appropriate sacrifice is required to start this ritual' for the demon ones.

Version of Minecraft, Bewitchment, Forge, Patchouli, and Baubles used

BW: 0.0.20.3
Forge: 14.23.5.2838
Baubles: 1.5.2
Patchouli: 1.0-20